[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-08-31 Thread Ubuntu Foundations Team Bug Bot
** Tags added: patch

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-08-31 Thread jecks
It is also possible, since we now know how the bug is triggered, should
Marcus open a new report?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-08-31 Thread jecks
This also explains the reason a person with a USB drive was seeing
thrashing (constant blinking) when using the fedora live environment
with many tabs open.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-08-31 Thread jecks
Do you think this could eventually be merged into a kernel? Has anyone
filed a kernel bugzilla with the patch so we can improve it, and get it
merged to the kernel?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-08-31 Thread Marcus Linsner
The attached kernel patch (applied on top of 4.18.5) that I've tried,
almost completely eliminates the disk thrashing(the constant reading of
executable(and .so) files on every context switch) associated with
freezing the OS and so, with this patch, the OOM-killer is triggered
within a maxium of 1 second when it is needed, rather than, without this
patch, freeze the OS for minutes(or just a long time, it may even auto
reboot depending on your kernel .config options set to panic(reboot) on
hang after xx seconds) with constant disk reading well before OOM-killer
gets triggered.

More info as to why OS freezes with constant disk reading when running
out of RAM, here: https://unix.stackexchange.com/a/463469/306023

The patch is from inside this question:
https://stackoverflow.com/q/52067753/10239615

Note: I don't recommend using this patch in production, without actual
programmers saying that it's ok first. I'm not a programmer. Maybe some
programmer could improve it?

I am using the patch currently inside a Qubes OS R4.0 Fedora 28 AppVM
where I can easily reproduce freezing the VM's OS (+ the constant disk
thrashing, seen from `sudo iotop` in dom0) without the patch, while
attempting to compile firefox with 4000MB max RAM setting for the VM,
and with the patch basically no freezing and little to no disk thrashing
during the 1 second it takes for OOM-killer to kill the offending
process(es).


** Patch added: "le9b.patch"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+attachment/5183022/+files/le9b.patch

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-07-01 Thread Christopher M. Penalver
jecks (slayerproof32), it is most unhelpful to post comments or
attachments here, or give pastebin links. If you want to motivate
developers to want to look into your issue, file a new report. If you
want developers to ignore your problem, continue posting here.

marco (nazgul17), one may always file a report manually via
https://bugs.launchpad.net/ubuntu/+source/linux/+filebug . For more on
this, please see https://help.ubuntu.com/community/ReportingBugs .

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread jecks
Consider also posting the output of 
Sudo parted -l

Here are my results if these commands. Iam running top right now and
will be posted soon.

https://pastebin.com/8q75EXyz 1 – Inxi-Fzxc0
https://pastebin.com/mnj4Bamu – Lspci -V
https://pastebin.com/KqpKuCa3 1 --Dmesg

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread jecks
I’d say you probably want to start with these 4 commands and posting the results
Lspci -v
Inxi  -Fzxc0
dmesg > dmesg.log (will save to ~/dmesg.log)


top -b > top.log (run this command, then trigger the memory issue. It will save 
to ~/top.log. If you have to hard reboot, the file will still be saved)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread marco
Hi Christopher,

How does one go about providing debugging information?
Please consider the limitations of an environment that does not respond to 
commands.

Thank you!

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread Christopher M. Penalver
jecks (slayerproof32), this report is poorly defined, and not root caused as no 
debugging logs have been provided by the original reporter. However, what 
little is known is that the issue for the original reporter was correlated to 
when DMA was disabled in the BIOS, using a now old, and unsupported version of 
Ubuntu. Hence, if you would like your issue root caused and resolved,  you will 
want to file a new report via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread Christopher M. Penalver
** Package changed: linux (Arch Linux) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Status: New => Incomplete

** No longer affects: linux (Ubuntu)

** Package changed: fedora => ubuntu

** Changed in: ubuntu
   Importance: Medium => Undecided

** Changed in: ubuntu
   Status: Won't Fix => New

** Changed in: ubuntu
 Remote watch: Red Hat Bugzilla #1472336 => None

** Changed in: ubuntu
   Importance: Undecided => Low

** Changed in: ubuntu
   Status: New => Incomplete

** Package changed: ubuntu => linux (Ubuntu)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread Christopher M. Penalver
** Summary changed:

- System freeze on high memory usage
+ System freeze on high memory usage when DMA is disabled

** No longer affects: linux (Ubuntu)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage when DMA is disabled

2018-06-30 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: linux (Ubuntu)
   Status: New => Confirmed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage when DMA is disabled

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-06-30 Thread jecks
Sitting here with a whole bunch of tabs open in YouTube. Memory used is
3.5 out of 3.7. Swap is now 760 megabytes. This is after my system has
been left untouched for about 10 mins now. CPU usage is anywhere from 30
to 60%. It unfroze about a minute ago, but is still super slow, and it
refroze when I tried to click “processes” in the system monitor app.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Won't Fix

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-06-29 Thread Taddeo Manzi
"Won't fix"? This bug does not permit me to zip big files.
"Sorry mom, you can't zip those files, GNU/Linux thinks your pc hasn't enough 
power to do it, best coming back to windows, where ram filling up doesn't kill 
your system."

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Won't Fix

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-05-29 Thread Bug Watch Updater
** Changed in: fedora
   Status: Confirmed => Won't Fix

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Won't Fix

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-05-16 Thread mostafa741
still happens with Fedora 28

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-05-05 Thread jecks
System crashes on high mem usage

Steps to reproduce 
Open you fav browser
Open a Youtube video and 4 tabs of google docs
Check system monitor for ram usage
Wow. 98.8% and only 10% swap used???
Open one more tab
System crash, have to reboot by holding power button

Expected result
The memory is freed by swapping more files onto my swap partition

Tested bug on 
-Opensuse Leap 15.0
-Fedora 28
-Ubuntu 18.04
-Manjaro Linux (latest version)

Specs
-CPU core 2 duo e6400 (usage is not high when the system crashes)
-2.9 (3gb) Elpida ddr2 ram 533 MHz
-Gnome 3.26 and 3.28
-Ati x1300 Gpu
-3.0 gb swap partition 


Open a few more google docs tabs and crush my other computer with
-CPU i5-520M
-3.9 (4gb) Ram
-Gnome 3.28
-Intel Igpu
-4gb swap

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-05-04 Thread lou
..Forgot to add, the Fedora 27 live version is running on one laptop in
which I've upgraded the RAM to 8Gb. It has an (older version) Core-i5 in
it for those curious and runs developer version of FF (60).

It has happens here with gedit with 8 files opened, 2 file manager
windows and 8 tabs, 3 or 4 xterms, Signal app, vlc occasionally playing
audio.. that's the base.

# uname -a
Linux localhost-live 4.13.9-300.fc27.x86_64 #1 SMP Mon Oct 23 13:41:58 UTC 2017 
x86_64 x86_64 x86_64 GNU/Linux

Excuse me while I restart the browser, I'm at 97%. (maybe logout and HUP
gnome-shell too from the console because I'm starting off low on memory
already)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-05-04 Thread lou
Fedora 27, fully affected.

New to linux a couple of years ago, I decided to try 'live' versions on
two Win 7 laptops (4GB Ram each).

Debian 8.6 first, then 8.7, 9.2 and 9.3. Ubuntu 14,15,16
Fedora 26, currently 27
DE's: Xfce, GNOME, Unity, Mate, Cinnamon, always the same problem.
(XFce hold up the longest; less memory intensive)

Manifested when multiple tabs are opened on the web browser (10,15,20,25, 
depending on the browser and version and how memory intensive it is):
FF52 up to 61 developers (the newer ones eat up memory faster)
Chrome, Chromium.

I banged my head against the wall for 1.5 years before I stumbled upon
this thread, thinking it was bad memory (many days of running memtest),
or other hardware (but in both laptops? Couldn't be).

The system will suddenly SEIZE up if you're close to memory capacity. If
I am close, and I take my eyes off the USB drive for an instant and it
begins to flash non-stop, once it goes beyond 10 seconds I likely cannot
drop to the console I keep opened to kill the Firefox ps. Maybe it will
respond after an hour, 2 or 4 hours, usually not. Time to power off.

Now I keep gnome-system-monitor opened and watch the memory approach 96%
and restart the browser, and in the case of Debian/Ubuntu on X11,
restart gnome-shell (which has a major leak problem also).

On one laptop I did make a separate partition for Deb 8.7 with a swap
space. Same thing happens. I will observe the HD light come on and stay
solid. That's the end.

I was shocked to find this bug and that it has existed for more than 10
years.

It makes this almost an nonviable platform and I'm loving Linux
otherwise.

Sorry for the rant, there was 1.5 years of frustration built into it.

Thanks for all the work the dev's do, I know it aint easy.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-04-01 Thread Bug Watch Updater
Launchpad has imported 4 comments from the remote bug at
https://bugzilla.redhat.com/show_bug.cgi?id=1472336.

If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
Launchpad's inter-bugtracker facilities at
https://help.launchpad.net/InterBugTracking.


On 2017-07-18T13:24:02+00:00 Steven wrote:

After a fix to glibc that fixed Unity 3D based games (Fedora ref: https://
bugzilla.redhat.com/show_bug.cgi?id=1440287), I have noticed that when I play 
Cities: Skylines that the system becomes unresponsive when digging into swap.

I have 10Gb of RAM in this system and run Fedora 26. If I launch Cities: 
Skylines with no swap space, things run well performance wise until I get an 
OOM - and it all dies - which is expected.

When I turn on swap to /dev/sda2 which resides on an SSD, I get complete 
system freezes while swap is being accessed.

The first swap was after loading a saved game, then launching kmail in the 
background. This caused ~500Mb to be swapped to /dev/sda2 on an SSD. The 
system froze for about 8 minutes - barely being able to move the mouse. The 
HDD LED was on constantly during the entire time.

To hopefully rule out the above glibc issue, I started the game via jemalloc - 
but experienced even more severe freezes while swapping. I gave up waiting 
after 13 minutes of non-responsiveness - not even being able to move the mouse 
properly.

During these hangs, I could typed into a Konsole window, and some of the 
typing took 3+ minutes to display on the screen (yay for buffers?).

I have tested this with both the default vm.swappiness values, as well as the 
following:
vm.swappiness = 1
vm.min_free_kbytes = 32768
vm.vfs_cache_pressure = 60

I noticed that when I do eventually get screen updates, all 8 cpus (4 cores / 
2 threads) show 100% CPU usage - and kswapd is right up there in the process 
list for CPU usage. Sadly I haven't been able to capture this information 
fully yet due to said unresponsiveness.

This seems to be a relatively new problem that I did not encounter during the 
Fedora 26 beta - but do now.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/comments/61


On 2017-07-18T13:25:32+00:00 Steven wrote:

Forgot to add kernel version!

Currently testing with:
kernel-4.11.10-300.fc26.x86_64

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/comments/62


On 2017-10-20T17:07:52+00:00 Jan wrote:

Related bug reports:

https://bugzilla.redhat.com/show_bug.cgi?id=1357032
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/comments/65


On 2018-02-28T03:52:10+00:00 Laura wrote:

We apologize for the inconvenience.  There is a large number of bugs to go 
through and several of them have gone stale. The kernel moves very fast so bugs 
may get fixed as part of a kernel update. Due to this, we are doing a mass bug 
update across all of the Fedora 26 kernel bugs.
 
Fedora 26 has now been rebased to 4.15.4-200.fc26.  Please test this kernel 
update (or newer) and let us know if you issue has been resolved or if it is 
still present with the newer kernel.
 
If you have moved on to Fedora 27, and are still experiencing this issue, 
please change the version to Fedora 27.
 
If you experience different issues, please open a new bug report for those.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/comments/71


** Changed in: fedora
   Status: Unknown => Confirmed

** Changed in: fedora
   Importance: Unknown => Medium

** Bug watch added: Red Hat Bugzilla #1357032
   https://bugzilla.redhat.com/show_bug.cgi?id=1357032

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 

[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-04-01 Thread Daniel Aleksandersen
** Bug watch added: Red Hat Bugzilla #1472336
   https://bugzilla.redhat.com/show_bug.cgi?id=1472336

** Also affects: fedora via
   https://bugzilla.redhat.com/show_bug.cgi?id=1472336
   Importance: Unknown
   Status: Unknown

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Unknown

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-03-31 Thread Nandakumar Edamana
I noticed this same issue on Ubuntu 17.10. I didn't find swapping to be
this annoying until recently. May be I've switched to swap file instead
of partition? But I think it existed even before I did the switched.
However, I had never (or at least this frequently) noticed freeze
conditions due to swapping with the previous versions. My swappiness is
the default, 60, and it should never cause such a condition in a perfect
world, I think.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-03-30 Thread Lancillotto
Here is the solution my similar problem:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1526537/comments/27
.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-03-29 Thread Lancillotto
I have the same issue on Linux Mint 18.3 64 bit and it is reproducibile
by the attached script.


** Attachment added: "mem-eater"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+attachment/5094516/+files/mem-eater

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-03-27 Thread Alekk
Very annoying. Successfully preventing from using Linux as reliable
system.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-03-10 Thread cm
This is still happening in Ubuntu 17.10. Last time I tried to use ubuntu
it was with 16.04 and I had to stop using it because of this issue. This
is a critical bug, and I cannot understand that it is marked as low
priority and not assigned to anyone.

I cannot use Linux like this, I don't use the computer to browse web
pages and write a couple of documents, for that I would buy a tablet, I
use the computer to perform large computations, and they will overtake
the existing RAM of the computer.

I had a process that was generating a delanuay triangulation with a
large set of nodes, and it was impossible to perform this calculation in
Ubuntu, I switched to a MacBook pro with similar specs and the
computation finished in 2 min.

I have already tweaked the system using zram, zswap, changing the values
of the vm., like swappinness, etc. to no avail.

This is preventing me to change to Linux, and it should be fixed.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-02-05 Thread Iiridayn
** Also affects: linux (Arch Linux)
   Importance: Undecided
   Status: New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed
Status in linux package in Arch Linux:
  New

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-01-17 Thread mostafa741
I hope this bug will be fixed soon, this bug preventing me from
switching to Linux it also affects Fedora 27

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2018-01-16 Thread Mihai b
My ubuntu box is frozen and there is nothing I can do (i.e. the keyboard is not 
working).
 Why the kernel is not killing or pausing the processe(s) that are draining the 
resources? On my Mac it always stops them and ask to kill it or keep running. 
This is the last time I'm using linux(as my main/personal computer).  It's just 
not for personal use. It's just mean to run it for internet services running in 
high availability configurations that can be restarted/trashed. 

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-12-28 Thread flamencist
Ubuntu 16.04.3 LTS
Memory - 6 Gb
I have simple steps for reproducing:
1. Open firefox
2. Open 
https://github.com/J0rgeSerran0/vscode-csharp-snippets/blob/master/TUTORIALS.md
It's documentation with few .gif images.
That's it.

How can to limit memory consuming for process in Ubuntu ?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


Re: [Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-11-15 Thread yas
Hi SwaJime, you need to run 'sudo su' first and then the free sequence.
Echoing the value to drop_caches requiere super user permissions. HTH

2017-11-15 19:38 GMT+01:00 SwaJime <159...@bugs.launchpad.net>:

> yas, when I try that, I get "bash: /proc/sys/vm/drop_caches: Permission
> denied" on Ubuntu 16.04
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/159356
>
> Title:
>   System freeze on high memory usage
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> Bug description:
>   I run a batch matlab job server here at my lab, running Dapper 6.06 (for
> the LTS). One of the users has submitted a very memory-consuming job, which
> successfully crashes the server. Upon closer inspection, the crash happens
> like this:
>   1. I run matlab with the given file (as an ordinary, unpriveleged user)
>   2. RAM usage quickly fills up
>   3. Once the RAM meter hits 100%, the system freezes: All SSH connections
> freeze up, and while switching VTs directly on the machine works, no new
> processes run - so one can't log in, or do anything if he is logged in.
> (Sometimes typing doesn't work at all)
>
>   Note that the swap - while 7 gigs of it are available - is never used.
>   (The machine has 7 gigs of RAM as well)
>
>   I've tried the same on my Gutsy 32-bit box, and there was no system
>   freezeup - matlab simply notified that the system was out of memory.
>   However, it did this once memory was 100% in use - and still, swap
>   didn't get used at all! (Though it is mounted correctly and shows up
>   in "top" and "free").
>
>   So first thing's first - I'd like to eliminate the crash issue. I
>   suppose I could switch the server to 32-bit, but I think that would be
>   a performance loss, considering that it does a lot of heavy
>   computation. There is no reason, however, that this should happen on a
>   64-bit machine anyway. Why does it?
>
>   WORKAROUND: Enabling DMA in the BIOS
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions
>

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-11-15 Thread SwaJime
yas, when I try that, I get "bash: /proc/sys/vm/drop_caches: Permission
denied" on Ubuntu 16.04

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-09-27 Thread yas
Hi to the new updaters, :-)

I found this to happen with several instances of chrome, or with file 
operations over big files in combination. I've filed a bug report that was 
confirmed a couple of years ago:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1504914

One thing that helped me to avoid some hang if I manage to do it
promptly was to go su and use the drop_caches

$ sudo su
$ free -h  && sync && echo 3 > /proc/sys/vm/drop_caches && free -h

But this works temporarily and as long as I don't keep with many instances or 
big files accesses.
HTH

PS:
Ubuntu 16.04.03, encrypted home, 16GB RAM, 16Gb swap file. Default swapiness, 
cache_pressure and min_free_kbytes
uname -a
Linux big 4.4.0-96-generic #119-Ubuntu SMP Tue Sep 12 14:59:54 UTC 2017 x86_64 
x86_64 x86_64 GNU/Linux

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-09-26 Thread insp
Ubuntu 16.04.3, encrypted disk, 8GB RAM, 11GB swap file. Default
swapiness and cache_presure. System almost hang (feels like 1 frame per
5 seconds) with full RAM and 7.7/11GB swap used.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-02-19 Thread FireWolf
Ubuntu LTS 16.04.2
uname -a
Linux DESKTOP 4.4.0-63-generic #84-Ubuntu SMP Wed Feb 1 17:20:32 UTC 2017 
x86_64 x86_64 x86_64 GNU/Linux
Memory from top:
KiB Mem : 16107416 total, 10167280 free,  3403820 used,  2536316 buff/cache
KiB Swap:0 total,0 free,0 used. 11914184 avail Mem 

grep -v "^#" /etc/sysctl.conf 
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem="4096 87380 16777216"
net.ipv4.tcp_wmem="4096 65536 16777216"
net.ipv4.tcp_no_metrics_save=1
vm.swappiness = 5
vm.min_free_kbytes=65536


/etc$ cat lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.2 LTS"


100% repeatable freezing on high memory usage.
Today test: 
1. 3 vbox copies with 2Gb RAM.
2. tomcat, hornetq - with default settings.
3. firefox+thunderbird.
4. and final before freezing: started VLC with mkv movie 8.6Gb.
VLC works around 2-3 minutes and eat all free memory and after system slow down.
In 5-6 seconds system goes down more - mouse cursor not moving, switch to 
console extremely slow.
Video on system hangs: https://youtu.be/73b8SxllTLs
While system hangs it extremely much accessing to HDD.
Please ask any logs/settings I'm ready to help.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2017-02-03 Thread justauser
My Setup: Ubuntu 14.04.05 LTS, encrypted home & swap (but swap disabled,
cause mounting wasnt possible... another known bug).

Over the normal ubuntu usage over the day my RAM stays in a "common range".
When I transfer data to an ntfs (ntfs3g mounted) partition / harddrive or read 
from such a device, my RAM fills up really fast and stays full for the rest of 
the time, till my PC freezes or a force-logout happens.
It really just happens significantly when an ntfs partition is used. My btrfs 
home partition an system doesnt fill the RAM. To clear cache and buffer I just 
need to "remove the drive savely" (or use the kernel parameter drop_cache).

Can anyone reproduce this?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-11-17 Thread Fedge
This seems to be a vanilla Linux kernel problem as I am experiencing
this on Fedora 24 as well.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-11-12 Thread dw1
This has been bothering me for a long time on Ubuntu 14.04. I installed
with encrypted home and swap, but after numerous freezes tried
unencrypted swap and now just run with disabled swap however it still
seems to kick in automatically and start freezing when I run out of RAM.
Most of the time when it starts to freeze up I notice and quickly hit
Ctrl-W or Alt-F4 to save the system, free up some memory and keep using
it.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-09-13 Thread f1ex
I have the same probem on my laptom with 8Gb without swap. I've just ran
Chrome, Idea and VMs. This problem also affected work Desktop with 16 Gb
of memory. I've tried new kernels - 4.7, 4.8, but they did not help me.
The laptop often freeze and I have to reboot it.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-09-11 Thread codexp
I am now on 4.7.2-201.fc24.x86_64 and that problem seems still to be present.
I did not have that on Ubuntu though. I have it since I have Fedora installed.
So could even be a configuration problem?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-07-07 Thread Tom Fields
Maybe Linux 4.7 adresses the out-of-memory issues with the following
changes:

http://lwn.net/Articles/684945/

https://git.kernel.org/torvalds/c/0a0337e0d1d134465778a16f5cbea95086e8e9e0
https://git.kernel.org/torvalds/c/e28e909c36bb5d6319953822d84df00fce7cbd18

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-07-04 Thread jion
Why this bug is not taking in account? I deal with this issue for at
least 2 years. Ubuntu 64bits + Chrome = Freezes all the time.

With 8Gb of RAM the system frezees all the time, I work with ubuntu as
web developer and I need to force kill chrome several times at day. Is
frustrating. There is a lot of people with this problem and however the
bug has "incomplete" status.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-06-15 Thread Renato Riolino
I have the same problem.  Currently I'm using Ubuntu 14.04 64bits.  I
have 4GB of RAM and no swap.  If I open too many apps and memory usage
goes to 100%, the system completely freezes.

Before 14.04, I was using 8.04 32bits and this problem never happend. If
all the memory was used, new apps would just crash when trying to malloc
but the system will still remain solid stable.

My system is: Intel Core 2 Duo, 4GB RAM, nVidia GPU and Ubuntu 14.04.4
LTS

Tried already to increase /proc/sys/vm/min_free_kbytes to 270336, but
the problem persists.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-06-15 Thread Dan Dascalescu
Still experiencing this on Ubuntu 16.04 64-bit. The culprit is Chrome -
I need to run two different versions at the same time for testing, and
with ~20 tabs open in each, after 1-2 days of usage, Ubuntu freezes
(unresponsive mouse cursor, the only thing that works is the power
button).

I would say it's a little embarrassing that this bug has remained
unfixed since 2007, but I'm also an open source contributor (though
unfortunately not on kernels), so I won't complain.

However, would it be possible to do something like what Windows does,
and warn the user to close one or more applications when the amount of
free memory is dangerously low?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-04-13 Thread marco
This has annoyed me through the years on different machines and on different 
distributions ((K)Ubuntu and Debian).
I am here because I experienced it, once more, a few minutes ago. Hard-drive 
(SSDs are silent, but I could tell from the led) usage skyrocketed even though 
I do not have any swap partition. Mouse cursor lagged, and even Ctrl+Alt+F1 
(take me to a console) or Ctrl+Alt+Backspace (terminate X) did not work. I had 
to hit the power button.

If I can be of any help, I will do my best. This bug is the single worst
thing in the Linux experience that I have ever had.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-03-09 Thread Cossio
Here it is:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1555351

How do I "subscribe you" to it?

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-03-09 Thread Christopher M. Penalver
Cossio, it will help immensely if you filed a new report with the Ubuntu 
repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-03-09 Thread Cossio
Any intensive task will completely freeze the system, making it
impossible to kill the offending process until it terminates. Only
"solution" is to reboot system.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2016-03-09 Thread Cossio
This is still happening in 15.10.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-10-15 Thread h
same problem with Ubuntu 14.10 64x when use matlab to load lots of data
for training. It doesn't kill it after a couple of minutes, it takes
hours and never comes alive again. I have to restart manually and then
my ubuntu can not boot.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-10-15 Thread Christopher M. Penalver
h, 14.10 is End of Life so it will never receive any further updates as 
outlined in https://wiki.ubuntu.com/Releases . However, if this is reproducible 
in a supported release, it will help immensely if you filed a new report via a 
terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-10-11 Thread yas
hi Christopher, filed
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1504914 and
subscribed you as suggested to follow it up. HTH

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-10-10 Thread Christopher M. Penalver
yas, it would help immensely if you filed a new report via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-10-10 Thread yas
I've found this advise to be helpful: 
http://askubuntu.com/questions/41778/computer-freezing-on-almost-full-ram-possibly-disk-cache-problem
 
even without swap file/partition reserving some memory through the
vm.min_free_kbytes parameter help avoid the freeze.
I've reproduce it opening a lot of chrome browser windows (CTRL+t) 
Ubuntu 14.04 (64-bits) Samsung Ultra np900x3a-a01es i5 4Gb RAM SSD

I've added to /etc/sysctl.conf
vm.min_free_kbytes=131072
vm.swappiness=5

HTH

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in "top" and "free").

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-04-12 Thread Christopher M. Penalver
asgard2, it would help immensely if you filed a new report via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in top and free).

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-04-12 Thread asgard2
same problem with Ubuntu 14.10 and 3.16.0-34-generic.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in top and free).

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2015-03-22 Thread Soo
I also encounter the same problem on 14.04 LTS. With 10+ windows open,
the system becomes frozen unexpectedly. Once it's frozen, it either
becomes totally unresponsive such that nothing works except for the
long-press power button or minimally responsive so that I can shift to
terminal using CTRL+ALT+F1. But then, the terminal is so slow as well
and I eventually turn the system off with power button.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in top and free).

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp


[Kernel-packages] [Bug 159356] Re: System freeze on high memory usage

2014-10-06 Thread Maxim Imakaev
I have experienced the same issue since I started using Ubuntu 8.04.
Often one of the users will run a program which would take a lot of
memory, and this would completely freeze graphics and make all text
terminals very slow. Sometimes I run a code which accidentally allocates
more than my 32GB RAM, and if I don't hit Ctrl+C within 1-2 seconds, it
will never even go through in gnome-terminal. The only solution would be
to  SSH in to the machine and kill the process manually.

In some cases even ssh or console login do not help, and I have to wait
for hours or reboot the machine.

I am surprised that there is no way to save 50-100 megabytes of RAM free
for a root to log in and kill the process; it would be very helpful,
especially when rebooting the computer is not possible.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I run a batch matlab job server here at my lab, running Dapper 6.06 (for the 
LTS). One of the users has submitted a very memory-consuming job, which 
successfully crashes the server. Upon closer inspection, the crash happens like 
this:
  1. I run matlab with the given file (as an ordinary, unpriveleged user)
  2. RAM usage quickly fills up
  3. Once the RAM meter hits 100%, the system freezes: All SSH connections 
freeze up, and while switching VTs directly on the machine works, no new 
processes run - so one can't log in, or do anything if he is logged in. 
(Sometimes typing doesn't work at all)

  Note that the swap - while 7 gigs of it are available - is never used.
  (The machine has 7 gigs of RAM as well)

  I've tried the same on my Gutsy 32-bit box, and there was no system
  freezeup - matlab simply notified that the system was out of memory.
  However, it did this once memory was 100% in use - and still, swap
  didn't get used at all! (Though it is mounted correctly and shows up
  in top and free).

  So first thing's first - I'd like to eliminate the crash issue. I
  suppose I could switch the server to 32-bit, but I think that would be
  a performance loss, considering that it does a lot of heavy
  computation. There is no reason, however, that this should happen on a
  64-bit machine anyway. Why does it?

  WORKAROUND: Enabling DMA in the BIOS

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/159356/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp