You can potentially use numactl to launch the process and set a policy
of interleaving allocations between NUMA nodes to avoid these 1 sided
allocations. Tends to happen with servers that make big allocations
from a single thread during startup, as commonly seen on mysqld servers
and the
In our production environment of ~1800 nodes we've seen oom-kill events
that looked similar to this bug's pattern - oom-kills killing large
server processes while resident memory was far lower than available
physical memory.
We were affected by the original bug and saw that issue readily
** Description changed:
- I recently replaced some Xenial servers, and started experiencing "Out
- of memory" problems with the default kernel.
+ After a fix for LP#1647400, a bug that caused freezes under some
+ workloads, some users noticed regular OOMs. Those regular OOMs were
+ reported under
Side Question... Is there something I can specifically look for on a
Ubuntu install that would indicate if that kernel has the fix or not. I
assume the "Fix or Not" indicates are manually triggered and the fix
could be out for AWS but not indicated.
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We believe that we are experiencing this issue on kernel 4.4.0-1030-aws
as well. We recently move from 14 LTS to 16LTS and are now experience
oom kills.
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Not sure if it's the same issue, but we had an unexpected OOM with
Ubuntu 16.04.3 LTS, 4.4.0-91.
Oct 31 23:52:25 db3 kernel: [6569272.882023] psql invoked oom-killer:
gfp_mask=0x26000c0, order=2, oom_score_adj=0
...
Oct 31 23:52:25 db3 kernel: [6569272.882154] Mem-Info:
Oct 31 23:52:25 db3
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-aws (Ubuntu Xenial)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-aws (Ubuntu)
Status: New => Confirmed
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Title:
** Changed in: linux-raspi2 (Ubuntu)
Status: Confirmed => Fix Committed
** Changed in: linux-raspi2 (Ubuntu Xenial)
Status: Confirmed => Fix Committed
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Attached kern.log
** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842/+attachment/4944721/+files/kern.log
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We have found this issue on 4.4.0-92 too.
But only when the systems were put under stress.
Reverting back to 4.4.0-57 resolved it.
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842/+attachment/4944720/+files/dmesg.txt
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With the sysctl settings provided by Pete (vm.min_free_kbytes = 100
and vm.zone_reclaim_mode = 1), we've been running the linux-aws
4.4.0-1028.37 kernel successfully without an OOM killer invocation for
about four days now. Previously we would have seen three or more
occurrences of this per
Attaching dmesg output
** Attachment added: "dmesg-kernel4.4.0-89.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842/+attachment/4934014/+files/dmesg-kernel4.4.0-89.txt
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We have another case of OOM at one of the host that we upgraded kernel
to 4.4.0-89 a week ago.
kern.log attached.
** Attachment added: "Kern log attached."
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842/+attachment/4934013/+files/kern-log-kernel4.4.0-89.txt
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> kthreadd invoked oom-killer: gfp_mask=0x26000c0, order=2,
oom_score_adj=0
Yea - that 2nd order allocation failure is the exact same issue I was
able to see (same GFP mask also)
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Apologies - the file was inadvertently split by logrotate. I have
concatenated the entire contents of kern.log and kern.log.1 into the
attached file; these are the only kern.log files in /var/log on the
system.
I do have to redact the hostname in question, but it is a simple
substitution of
I have seemingly solved this issue with linux-aws version 4.4.0-1016-aws
at the very least. The specific issue I was seeing was 2nd order
allocations failing when OOMKiller triggered. At the time I was
thinking the issue was due to XFS and memory fragmentation with lots and
lots of memory mapped
Please, do not cut the logs. Without the "invoked oom-killer" line, for
example, it's hard to see the gfp flags and allocation order that
failed.
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We are also experiencing this issue running linux-aws 4.4.0-1028.37,
which tracks Ubuntu kernel 4.4.0-89.112. Our use case is very similar to
comment #86
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842/comments/86).
In our case ElasticSearch 2.4.5 is running under Java 1.8.0_131 with
Hi
I am experiencing at one of our compute node hypervisor. kernel version
we are using is 4.4.0-83, but seems to be having the issue reported in
this report.
[Mon Aug 7 00:19:42 2017] nova-compute invoked oom-killer: gfp_mask=0x2c200ca,
order=0, oom_score_adj=0
[Mon Aug 7 00:19:42 2017]
Mine's also still stable (no OOMs), after running the patched kernel for
9 days, on a Raspberry pi 2 Model B v1.1.
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Title:
"Out of memory"
4.4.0-1062-raspi2 is looking good - I've had it running for a week
without oom-killer being invoked.
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Title:
"Out of memory" errors after
Update: No sign of Out-of-memory errors or kills, after 3 days of
testing the 4.4.0-1062-raspi2 kernel. I'll report back again next week.
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Title:
Sure.
I undid the workaround, installed and booted the kernel and will test it for a
few days. I'll keep you posted on results.
Thanks Paolo!
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Chris, can you test if this kernel solves your problem?
http://people.canonical.com/~ppisati/lp1655842/linux-
image-4.4.0-1062-raspi2_4.4.0-1062.70~lp1655842_armhf.deb
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** Changed in: linux-raspi2 (Ubuntu)
Assignee: (unassigned) => Paolo Pisati (p-pisati)
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Title:
"Out of memory" errors after upgrade to
The bug is still confirmed and not fixed for linux-raspi2 (Ubuntu), 5
months after getting fixed for the main Ubuntu.
Shouldn't this have some priority? Even apt upgrade breaks if I don't
use the clear cache workaround. I can live with it (cron job to clear
cache) but this is not great for LTS.
@nicholas-hatch - what file system are your disks formatted as? I was
able to stop the OOM's on my ES hosts by moving from XFS to EXT4. My
belief is that there was a memory fragmentation issue with ES and many
small files on XFS formatted volumes.
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We're still having issues with higher-order allocations failing and
triggering an OOM kill for unexplainable reasons. (on 4.4.0-78-generic).
I've attached the relevant OOM killer logs. It may be relevant to note
that the server these logs are from is an Elasticsearch instance with a
large (~32GB)
Also observed with 4.4.0-1054-raspi2. I'm now back on 4.4.0-1038-raspi2.
I think that one was ok.
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Title:
"Out of memory" errors after upgrade
** Changed in: linux-raspi2 (Ubuntu)
Status: New => Confirmed
** Changed in: linux-raspi2 (Ubuntu Xenial)
Status: New => Confirmed
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I'm seeing oom-killer being invoked despite having 2GB free swap when
using the kernel from linux-image-4.4.0-1055-raspi2 version
4.4.0-1055.62.
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linux-raspi2 version 4.4.0.1055.56 that is.
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
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This is still an issue in the current linux-raspi2 version. Where those
changes ported to that kernel?
** Also affects: linux-raspi2 (Ubuntu)
Importance: Undecided
Status: New
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I'd like to emphasise that the OOM problem only happens with KDE. I have
several DE installed including Unity, GNOME3, Cinnamon. But none of them
caused a OOM, at least I never noticed. But in KDE, most of the time
when chrome is opened, it triggers OOM. dmesg tells that, sometimes
kwin_x11
I also haven't personally encountered any further OOM issues on my home
desktop (used daily) with 4.4.0.63.
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Title:
"Out of memory" errors after
Yes, 4.4.0.63 solved our OOM issues (and we had plenty after 4.4.0.59).
Ours were all headless server (bare metal and VMs) related though - no
desktop usage.
But I never experienced this issue with my home laptop either, but that
had lots of RAM and was only lightly used during that period - not
Anybody having successfully tested 4.4.0.63 for OOM-kill issue...
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
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I have 4.4.0-59 till 4.4.0-71 and 4.8.0-41 till 4.8.0-46 installed on my
system and all are affected by this bug. Firefox, Chrome and Netbeans
regularly get killed without a warning and for no reason (since I have
something like 10GB+ RAM and all 16GB Swap free at the time the process
gets
I was using 4.4.0-21 as reported by `uname -r` which is default in
Kubuntu 16.04. The same bug appears on mainline kernel 4.10 too!
Now, I'm in confusion. Which kernel should I upgrade to? Also I
experience this only in KDE session with yandex or chrome browser opened
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This is plaguing Horizon project Pi2 and Pi3 devices running Xenial
16.04.2 w/ kernel 4.4.0-1050-raspi2. From a pi2:
root@horizon-a17d2187:~# uname -a
Linux horizon-a17d2187 4.4.0-1050-raspi2 #57-Ubuntu SMP Wed Mar 22
12:52:22 UTC 2017 armv7l armv7l armv7l GNU/Linux
I am seeing this issue as well, on Arch kernel v 4.10.4-1
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
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We have been seeing this issue recently as well. We are running
4.4.0-66-generic #87-Ubuntu - I can attempt to downgrade to 4.4.0-57 but
its a large cluster with a lot of data so it may take some time.
Attached a kern.log from this most recent oom.
** Attachment added: "kern.log"
Hi Cascardo,
there is no related dmesg output after the incident (just some lines
from apt-daily.timer).
I filed a bug for the possible swap corruption issue here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1669707
Thanks so far.
Julian
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Julian, your logs indicate some possible swap corruption, would you mind
opening a new bug and sending it using apport-bug?
Thanks.
Cascardo.
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Hi, Julian.
Do you have the output of dmesg after the incident before a reboot?
Cascardo.
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Title:
"Out of memory" errors after upgrade to
Attached kern.log. Let me know in case you need more logs.
** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842/+attachment/4829766/+files/kern.log
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Hi, Anton and Julian.
Can you attach complete logs for investigation?
Thanks.
Cascardo.
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Title:
"Out of memory" errors after upgrade to
Same here on Linux 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30
UTC 2017 x86_64 x86_64 x86_64 GNU/Linux.
Out of memory: Kill process 11067 (java) score 28 or sacrifice child
Killed process 11067 (java) total-vm:3569724kB, anon-rss:211720kB,
file-rss:20208kB
systemd-journald[247]:
I still see OOM killer invocation on 4.4.0-64.85:
Feb 27 15:43:09 ip-10-0-9-47 kernel: [61385.857840] java invoked oom-killer:
gfp_mask=0x26000c0, order=2, oom_score_adj=0
Feb 27 15:43:09 ip-10-0-9-47 kernel: [61385.857846] java cpuset=/
mems_allowed=0-1
Feb 27 15:43:09 ip-10-0-9-47 kernel:
I can confirm 4.4.0-64.85 fixes our OOM issues.
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
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Could somebody please confirm that the issue has been fixed with the
kernel 4.4.0-64.85? We had massive problems with OOM killed qemu
instances on our virtualization hosts and would not like to have this
introduced again.
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I'm pretty sure this bug was introduced in 4.4.0-58, even though I
reported it against 4.4.0-59. Still, +1 for a raising a separate bug
against 4.8.
Thanks to Cascardo for fixing this one.
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The OOM fixes were introduced in 4.4.0-58 according to the changelog,
but sure.
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
To
Hi, Mr. Iain Buclaw.
Memory usage reports could be related to something else. This bug was
introduced at 4.4.0-59, you mention 4.4.0-58. We could certainly
investigate the issue you see, just not on this bug. Much more data is
necessary, but, please, don't attach new data to this bug. Your report
This is the reported /proc/meminfo Buffers usage for 4 different kernel
versions. We got the same OOM call traces on both 4.4.0-58 and
4.8.0-34, I highly doubt that to be a coincidence.
** Attachment added: "meminfo-buffers.png"
This bug is not about memory use. It's about the Linux kernel triggering
the OOM killer when higher-order (order 2) allocations are requested and
progress cannot be made. This affected Linux 4.7 on mainline and was
fixed on Linux 4.7 stable and Linux 4.8. When some fixes were backported
to
Yes they are, I'm seeing the same exorbitant memory usage that we had on
4.4.0-58 as am currently getting on 4.8.0-36.
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Title:
"Out of memory"
4.8 kernels are not affected by this bug. If you have OOMs on 4.8
kernels, please file a new bug with all the revelant details and logs.
Thanks.
Cascardo.
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Bug is prevalent on 4.8 kernels too.
---
[251529.693133] CPU: 3 PID: 1547 Comm: icinga2 Not tainted 4.8.0-34-generic
#36~16.04.1-Ubuntu
[251529.693134] Hardware name: MSI MS-7823/B85M-G43 (MS-7823), BIOS V3.14B3
06/23/2014
[251529.693135] 0286 e9fa7ede 95c3f774bb38
This bug was fixed in the package linux - 4.4.0-63.84
---
linux (4.4.0-63.84) xenial; urgency=low
[ Thadeu Lima de Souza Cascardo ]
* Release Tracking Bug
- LP: #1660704
* Backport Dirty COW patch to prevent wineserver freeze (LP: #1658270)
- SAUCE: mm: Respect
** Description changed:
I recently replaced some Xenial servers, and started experiencing "Out
of memory" problems with the default kernel.
We bake Amazon AMIs based on an official Ubuntu-provided image (ami-
e6b58e85, in ap-southeast-2, from https://cloud-
I was curious if I could answer Sridhar's question as I had the same
question.
The introduction of the problem appears to be in Ubuntu's packaging of
select upstream commits from 4.7 to address bug #1647400.
>From the comments in that case, it appears
6b4e3181d7bd5ca5ab6f45929e4a5ffa7ab4ab7f
Did anybody also notice any pattern in "invoked oom-killer". I see a
pattern like daily almost same time cron or scripts invoking oom-
killer...
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Thanks to those who reported/fixed this bug.
Out of curiosity, was this a bug in the 4.4.0-59 kernel itself or in
Ubuntu's packaging of the kernel, i.e. were other (non-Ubuntu) Linux
users impacted ?
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To throw some more light into the matter. Two machines were upgraded to
4.4.0-59 on 16th Jan, same load, but only one out of them is reporting
oom-kill. Anybody experiencing same scenario...
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Like Luk (#29), I upgraded to 4.8.0-34, but the problem disappeared for
me. I ran system for two days without any OOM-kills. Before that, simply
copying a big file (9Gb+) fired the system. My system has 16Gb RAM and
runs 16.04.1.
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you should re-release 4.4.0-62 as linux-image-chaosmonkey-virtual
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
To manage
Tested Ubuntu 4.4.0-63.84-generic 4.4.44 on a desktop system with a
workload which previously led to Chrome processes being OOM-killed.
Situation with 4.4.0-62-generic: between 8 and 54 processes OOM-killed per
24-hour period
Situation with 4.4.0-63-generic: no OOM-kills during 46 hours of
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
To
-63 works for me as well, thank you!
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
To manage notifications about this bug go to:
I've been using -63 for a while now (even before it was in proposed, via
an sbuild setup) on a machine that had OOM problems with -59, and I
haven't noticed any issues.
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der: Nate Eldredge <1655...@bugs.launchpad.net>
Time: Fri 2/10 19:21
To: wurlyfan <wurly...@gmail.com>
Subject: Re: [Bug 1655842] Re: "Out of memory" errors after upgrade to 4.4.0-59
>On Fri, 10 Feb 2017, Travisgevans wrote:
>
>> However, it might help if anyone h
I see this bug on Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-1042-raspi2
armv7l) as described here: https://superuser.com/questions/1176773
/ubuntu-on-rpi-starts-killing-processes-when-ram-is-filled-up-by-cache
The workaround by Krzysztof Dryja (cih997) works for me as well but is
very ugly and
On Fri, 10 Feb 2017, Travisgevans wrote:
> However, it might help if anyone has an idea how the OOM kill bug might
> be reliably reproduced. “5 working days” isn't very long to reliably be
> sure the problem is solved otherwise; it took more than half that time
> upon upgrading to -59 for me to
Don't forget that the earlier kernels are affected by Bug #1647400,
which does something even worse (hang the system). I've verified that it
affected my particular system before 4.4.0-59, and it may explain a
couple of lockups I had previously experienced during normal operation
when using
To be fair, there have been multiple USN-reported kernel security
patches fixed in post-57 kernels.
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Title:
"Out of memory" errors after upgrade
@nick-maynard: Why is such a bug unforgivable? You can just boot a
previous kernel instead. If you're concerned about availability then
don't reboot in the first place unless there's an important security
patch.
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Cascardo: Just to be clear, are you looking for verification from anyone
in the world, or from specific kernel testers?
(I'd like to help, but I'm only able to reproduce the issue in
production, and the process of debugging this issue when we ran into it
was already more restarts than is good for
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag
kulwinder singh: Either one, but nothing in between.
-57 will reintroduce a few (unrelated) security bugs as well as the bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1647400 whose fix
caused this one, but is easier to enable and has been tested for longer.
-63 should fix this bug,
Who is the saver 4.4.0-57-generic or 4.4.0-63-generic now.
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
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Testing...
Enabled proposed (https://wiki.ubuntu.com/Testing/EnableProposed).
Installed kernel packages:
# apt-get install -s -t xenial-proposed 'linux-headers-4.4.0.63$'
'linux-headers-4.4.0.63-generic$' 'linux-image-4.4.0.63-generic$'
'linux-image-extra-4.4.0.63-generic$'
Rebooted.
# cat
The fix is now available for testing in kernel version 4.4.0-63.84, if
you enable proposed[1]
$ apt-cache policy linux-image-4.4.0-63-generic
linux-image-4.4.0-63-generic:
Installed: (none)
==> Candidate: 4.4.0-63.84
Version table:
4.4.0-63.84 500
500
If this kernel is not going to hit -updates shortly (i.e. days), can
something be done to pull or downgrade the broken kernel? At least
revert linux-image-generic to depend back on linux-
image-4.4.0-57-generic which doesn't have the issues and will stop more
people from upgrading to a broken
LTS Ubuntu with -updates shouldn't have this sort of issue - this is,
frankly, unforgivable.
We need a new kernel urgently in -updates, and I'd expect serious
discussions within the kernel team to understand what has caused this
issue and avoid it reoccurring.
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Just by the way - 4.4.0-62-generic has the exact same problem. Even when
uninstalling 4.4.0-59-generic, my system at some point auto-updated to
4.4.0-62-generic . Only 4.4.0-57-generic is safe for now.
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Hi, Luk.
linux-image-4.8.0-34-generic should not be affected by this. If you see
unexpected OOM problems, please open a new bug report and attach the
kernel logs, please.
Thanks.
Cascardo.
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This bug also appears to affect linux-image-4.8.0-34-generic in 16.04.1
Xenial.
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Title:
"Out of memory" errors after upgrade to 4.4.0-59
To
When this new kernel will be released? This bug is killing our MySQL
Servers. Booting old kernels is only a bad workaround. I think a lot of
people with busy servers will have a problem.
This is 2.nd time we were hit by a big bug within short time. In oct 2016 our
nameservers got problems
I've been struggling with this bug for nearly a week and only now found
this issue. Thanks for fixing it!
For the sake of others finding it, here's the stack trace part of the
oom-killer log, which contains some terms I searched for a while ago
that aren't mentioned here yet.
docker invoked
As a note: I believe this also affects the armhf kernel
4.4.0-1040-raspi2 for the Raspberry Pi.
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Title:
"Out of memory" errors after upgrade to
@nate Thank you! You just saved me a lot of hassle as I was about to
unpin the 4.4.0-57 kernel and update a bunch of machines on the
assumption the fix was in that version.
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This is fixed in 4.4.0-63.84, which will be available in proposed soon.
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https://bugs.launchpad.net/bugs/1655842
Title:
"Out of memory" errors after upgrade to 4.4.0-59
To manage
I could not reboot my machine and the ugly workaround for this issue was
to login as root and clear system caches:
echo 3 > /proc/sys/vm/drop_caches
This made my machine stable again, at least for the time I needed.
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Just as a note for newcomers reading this, I can confirm the bug is NOT
fixed in the officially released 4.4.0-62.83.
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https://bugs.launchpad.net/bugs/1655842
Title:
"Out of memory"
This is a severe bug. It should be treated a high-priority bugfix that
cannot wait 3 weeks.
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Title:
"Out of memory" errors after upgrade to
** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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@Gaudenz Steinlin (gaudenz-debian),
It will takes 3 weeks to land in -updates pocket, but you can expect to
have a call for testing a proposed package by EOW.
- Eric
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@slashd It sounds really strange to me that I should wait til 20-Feb for
a fix for this bug while this is clearly a regression introduced with
the latest kernel upgrade. Is there no way to speed things up to fix
this regression.
Currently we had to downgrade all our xenial systems to linux-
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