[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2014-09-25 Thread Paul Szabo 
Following a suggestion in
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695182#513
I tested older kernels: seems that PAE was always (or at least back to
karmic 2.6.31) prone to OOM under the sleep test.
Curiously I found that non-PAE kernels of that vintage might also OOM,
maybe depending on the value of /proc/sys/fs/file-max .

Cheers, Paul

Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of SydneyAustralia


---

Machine: Dell Optiplex 760, 4GB RAM


Results:

Version Name  kernel
4.10Warty 2.6.8 (could not install from CD)
5.04Hoary 2.6.10
5.10Breezy2.6.12
6.06Dapper2.6.15
6.10Edgy  2.6.17
7.04Feisty2.6.20(could not install from CD)
7.10Gutsy 2.6.22(could not install from CD)
8.04Hardy 2.6.24
8.10Intrepid  2.6.27-7  (no PAE)  non-PAE(file-max=330344,default)=OK 
(about 19000 to file limit)
  non-PAE(file-max=555000)=OOM (after 
about 31000)
9.04Jaunty2.6.28
9.10Karmic2.6.31-14 PAE=OOM   non-PAE(file-max=327956,default)=OK 
(about 18500 to file limit)
  non-PAE(file-max=444000)=OK (about 
26000 to file limit)
  non-PAE(file-max=555000)=OK (to PID 
limit)
  non-PAE(file-max=888000)=OK (to PID 
limit)
  non-PAE(file-max=99)=OOM (after 
about 32500)
10.04   Lucid 2.6.32-65 PAE=OOM   non-PAE(file-max=330827,default)=OK 
(about 19000 to file limit)
  non-PAE(file-max=377000)=OK (about 
21500 to file limit)
  non-PAE(file-max=444000)=OK (about 
25500 to file limit)
  non-PAE(file-max=555000)=OOM (after 
about 31500)
10.10   Maverick  2.6.35-22 (PAE=?)   non-PAE(file-max=330677,default)=OK 
(to PID limit)
11.04   Natty 2.6.38-8  PAE=OOM   non-PAE(file-max=330426,default)=OK 
(to PID limit)
11.10   Oneiric   3.0.0 PAE=OOM   non-PAE=OK
12.04   Precise   3.2
12.10   Quantal   3.5
13.04   Raring3.8
13.10   Saucy 3.11
14.04   Trusty3.13  PAE=OOM   (no non-PAE kernel)
14.10   Utopic3.16


References:

http://en.wikipedia.org/wiki/List_of_Ubuntu_releases
https://wiki.ubuntu.com/Releases

http://old-releases.ubuntu.com/releases/

http://bugs.debian.org/695182
http://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098961


Commands used:

sudo sh -c 'echo 99  /proc/sys/fs/file-max'
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); ((m=n%500)); if 
[ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; done'


** Bug watch added: Debian Bug tracker #695182
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695182

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2014-09-17 Thread Paul Szabo 
Should a CVE be assigned, seeing how this issue causes a DoS?
And then a USN/DSA should be issued when eventually solved.
Should it be reported to SecurityFocus and obtain a BID?
Could the Status be changed to something better than Expired?
Would some kind soul confirm and explicitly state that this affects
multiple users?

-- 
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/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296
Low:865208 214080 651128
High:  412 4671081755304
-/+ buffers/cache: 1615602926060
Swap: 2920  0   2920
  and re-trying the sleep test, it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of SydneyAustralia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  psz2190 F pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
 Mixer name : 'SigmaTel STAC9227'
 Components : 'HDA:83847618,102801dd,00100201'
 Controls  : 38
 Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lono wireless extensions.
   
   eth0  no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet 
splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware1.79.1
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-35-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-04-27 (260 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog: Jan 13 06:42:46 DellE520 NetworkManager[1384]: info Unmanaged 
Device found; state CONNECTED forced. (see 
http://bugs.launchpad.net/bugs/191889)
  WpaSupplicantLog:
   
  dmi.bios.date: 03/23/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.2.1
  dmi.board.name: 0WG864
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias:

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2014-09-16 Thread Christopher M. Penalver 
** Tags added: trusty

-- 
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/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296
Low:865208 214080 651128
High:  412 4671081755304
-/+ buffers/cache: 1615602926060
Swap: 2920  0   2920
  and re-trying the sleep test, it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of SydneyAustralia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  psz2190 F pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
 Mixer name : 'SigmaTel STAC9227'
 Components : 'HDA:83847618,102801dd,00100201'
 Controls  : 38
 Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lono wireless extensions.
   
   eth0  no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet 
splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware1.79.1
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-35-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-04-27 (260 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog: Jan 13 06:42:46 DellE520 NetworkManager[1384]: info Unmanaged 
Device found; state CONNECTED forced. (see 
http://bugs.launchpad.net/bugs/191889)
  WpaSupplicantLog:
   
  dmi.bios.date: 03/23/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.2.1
  dmi.board.name: 0WG864
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr2.2.1:bd03/23/2007:svnDellInc.:pnDellDM061:pvr:rvnDellInc.:rn0WG864:rvr:cvnDellInc.:ct6:cvr:
  dmi.product.name: Dell DM061
  dmi.sys.vendor: Dell Inc.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2014-09-15 Thread Paul Szabo 
Now at Ubuntu VERSION=14.04.1 LTS, Trusty Tahr seems that the
one-and-only x86 kernel offered is with PAE, so I cannot easily
demonstrate the difference between PAE and non-PAE kernels.

With the PAE kernel, my machine produces an OOM crash with the
test command

  bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1));
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep
1; fi; done'

My conjecture is that all Linux machines will produce an OOM,
regardless of the amount of RAM memory installed.

Your challenge is to prove me wrong: find any one machine that
survives the above command without an OOM condition. (Obviously
the bug, and thus the challenge, is for Linux machines with x86
CPUs and PAE kernels; but is for any distros, not just Ubuntu.)
Should you succeed, you will have helped to better understand
this bug and so contribute to finding a solution; I also offer
the prize of a carton of beer to the first finder; and having
knocked me off my soapbox, you will be allowed to feel smug and
superior forever.

Should you fail the challenge and have your machine reproduce
an OOM crash, I urge you to complain to your Linux distributor
or to the kernel people. (Seems that bugs are left unfixed for
years if only a few people complain, to the point where Ubuntu
abandoned the working version non-PAE kernel.)

---

Maybe a workaround is to upgrade to 64-bit Linux with amd64
kernel. However... that is just a crude workaround without any
guarantee of correctness, until some understanding of this bug:
the kernel code is common between 32- and 64-bit.

---

Long and boring details below.

Cheers, Paul

Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of SydneyAustralia


-

psz@DellE520:~$ dpkg -l | grep linux-image
ii  linux-image-3.13.0-35-generic   3.13.0-35.62
i386 Linux kernel image for version 
3.13.0 on 32 bit x86 SMP
ii  linux-image-extra-3.13.0-35-generic 3.13.0-35.62
i386 Linux kernel extra modules for 
version 3.13.0 on 32 bit x86 SMP
ii  linux-image-generic 3.13.0.35.42
i386 Generic Linux kernel image
psz@DellE520:~$ 
psz@DellE520:~$ uname -a
Linux DellE520 3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15 01:58:01 UTC 2014 
i686 i686 i686 GNU/Linux
psz@DellE520:~$ 
psz@DellE520:~$ grep -H PAE /boot/conf*
/boot/config-3.13.0-35-generic:CONFIG_X86_PAE=y
psz@DellE520:~$ 
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   309241610278322064584 142520 125124 519192
Low:870004 444336 425668
High:  412 5834961638916
-/+ buffers/cache: 3835162708900
Swap: 2920  0   2920
psz@DellE520:~$ 
psz@DellE520:~$ ulimit -u
23950
psz@DellE520:~$ 
psz@DellE520:~$ bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'

The above produces an OOM as shown in /var/log/syslog :
Sep 15 17:12:54 DellE520 kernel: [  403.028298] bash invoked oom-killer: 
gfp_mask=0x2084d0, order=0, oom_score_adj=0
Sep 15 17:12:54 DellE520 kernel: [  403.028309] bash cpuset=/ mems_allowed=0
Sep 15 17:12:54 DellE520 kernel: [  403.028317] CPU: 1 PID: 19509 Comm: bash 
Not tainted 3.13.0-35-generic #62-Ubuntu
Sep 15 17:12:54 DellE520 kernel: [  403.028320] Hardware name: Dell Inc.
 Dell DM061   /0WG864, BIOS 2.4.0  05/24/2007
Sep 15 17:12:54 DellE520 kernel: [  403.028324]    eb845d68 
c1652f30 eb86b400 eb845dc0 c164f4d9 c18437dc
Sep 15 17:12:54 DellE520 kernel: [  403.028336]  eb86b70c 002084d0  
 f7b8d140  0046 
Sep 15 17:12:54 DellE520 kernel: [  403.028346]   0206 c1944560 
eb845dc0 e6e90d00 002084d0  eb845dcc
Sep 15 17:12:54 DellE520 kernel: [  403.028357] Call Trace:
Sep 15 17:12:54 DellE520 kernel: [  403.028372]  [c1652f30] 
dump_stack+0x41/0x52
Sep 15 17:12:54 DellE520 kernel: [  403.028378]  [c164f4d9] 
dump_header.isra.9+0x76/0x1c4
Sep 15 17:12:54 DellE520 kernel: [  403.028386]  [c11251d7] 
oom_kill_process+0x167/0x2b0
Sep 15 17:12:54 DellE520 kernel: [  403.028393]  [c12706fc] ? 
security_capable_noaudit+0x1c/0x30
Sep 15 17:12:54 DellE520 kernel: [  403.028399]  [c105fa5a] ? 
has_capability_noaudit+0x1a/0x30
Sep 15 17:12:54 DellE520 kernel: [  403.028405]  [c11256eb] 
out_of_memory+0x22b/0x260
Sep 15 17:12:54 DellE520 kernel: [  403.028410]  [c112a011] 
__alloc_pages_nodemask+0x861/0x980
Sep 15 17:12:54 DellE520 kernel: [  403.028417]  [c112a14c] 
__get_free_pages+0x1c/0x40
Sep 15 17:12:54 DellE520 kernel: [  403.028422]  [c104e3f8] 
pgd_alloc+0x38/0x250
Sep 15 17:12:54

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2013-10-10 Thread Paul Szabo 
Expired? That is weird... how come it did not expire between comments#18
and comments#19, between 16Jan and 6Aug?

Anyway the bug is alive... as anyone could easily test, with a simple

  bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1));
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep
1; fi; done'

On any PAE machine (any amount of RAM, any version userland code, and
any version kernel, I tested many), that should produce an OOM in a
minute or so. Conversely: does anyone have a PAE machine where the
above does not produce an OOM?

Yes I know I promised to test latest development and upstream or
somesuch. Sorry I did not get around to it, yet: the test would be
rather disruptive on my home computer.

I also note the suggestion (from kernel developers?) in the references
above, to use amd64 kernel even with 32-bit userland. Maybe Ubuntu could
follow suit.

Cheers, Paul

-- 
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/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296
Low:865208 214080 651128
High:  412 4671081755304
-/+ buffers/cache: 1615602926060
Swap: 2920  0   2920
  and re-trying the sleep test, it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of SydneyAustralia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  psz2190 F pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
 Mixer name : 'SigmaTel STAC9227'
 Components : 'HDA:83847618,102801dd,00100201'
 Controls  : 38
 Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lono wireless extensions.
   
   eth0  no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet 
splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware1.79.1
  RfKill:
   
  Tags:

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2013-10-09 Thread Launchpad Bug Tracker 
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
   Status: Incomplete = Expired

-- 
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/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296
Low:865208 214080 651128
High:  412 4671081755304
-/+ buffers/cache: 1615602926060
Swap: 2920  0   2920
  and re-trying the sleep test, it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of SydneyAustralia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  psz2190 F pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
 Mixer name : 'SigmaTel STAC9227'
 Components : 'HDA:83847618,102801dd,00100201'
 Controls  : 38
 Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lono wireless extensions.
   
   eth0  no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet 
splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware1.79.1
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-35-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-04-27 (260 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog: Jan 13 06:42:46 DellE520 NetworkManager[1384]: info Unmanaged 
Device found; state CONNECTED forced. (see 
http://bugs.launchpad.net/bugs/191889)
  WpaSupplicantLog:
   
  dmi.bios.date: 03/23/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.2.1
  dmi.board.name: 0WG864
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr2.2.1:bd03/23/2007:svnDellInc.:pnDellDM061:pvr:rvnDellInc.:rn0WG864:rvr:cvnDellInc.:ct6:cvr:
  dmi.product.name: Dell DM061
  dmi.sys.vendor: Dell Inc.

To manage notifications about

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2013-08-08 Thread Paul Szabo 
Dear Christopher,

Thanks for the hint about the BIOS.
I updated it, the BIOS version went from 2.2.1 to 2.4.0.

With the new BIOS and running non-PAE kernel:
  psz@DellE520:~$ uname -a
  Linux DellE520 3.2.0-51-generic #77-Ubuntu SMP Wed Jul 24 20:21:10 UTC 2013 
i686 i686 i386 GNU/Linux
  psz@DellE520:~$ free -l
   total   used   free sharedbuffers cached
  Mem:   308796011285041959456  0 152800 705708
  Low:861452 213880 647572
  High:  2226508 9146241311884
  -/+ buffers/cache: 2699962817964
  Swap: 2920  0   2920
it handled the sleep test
  bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); ((m=n%500)); 
if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; done'
just fine (as expected), running out of max user processes because of
default setting of ulimit -u 23964.

Installing the PAE kernel and rebooting (of course with new BIOS):
  psz@DellE520:~$ uname -a
  Linux DellE520 3.2.0-51-generic-pae #77-Ubuntu SMP Wed Jul 24 20:40:32 UTC 
2013 i686 i686 i386 GNU/Linux
  psz@DellE520:~$ free -l
   total   used   free sharedbuffers cached
  Mem:   3087592 6107402476852  0 112796 344216
  Low:865180 160496 704684
  High:  412 4502441772168
  -/+ buffers/cache: 1537282933864
  Swap: 2920  0   2920
(has default setting ulimit -u 23960) and re-trying the sleep test,
things went bad after 22500 processes. The graphics console crashed,
with X saying your graphics device is running in low-resolution mode
or somesuch, and with no mouse or keyboard response so could not click
the OK button. Hitting Alt-Ctrl-F2 worked and got a getty login.
Looking with ps, there were no sleep processes left running.
In /var/log/syslog I found:

Aug  8 20:01:48 DellE520 kernel: [  341.000570] oom_kill_process: 39 callbacks 
suppressed
Aug  8 20:01:48 DellE520 kernel: [  341.000578] bash invoked oom-killer: 
gfp_mask=0x84d0, order=0, oom_adj=0, oom_score_adj=0
Aug  8 20:01:48 DellE520 kernel: [  341.000584] bash cpuset=/ mems_allowed=0
Aug  8 20:01:48 DellE520 kernel: [  341.000589] Pid: 2375, comm: bash Not 
tainted 3.2.0-51-generic-pae #77-Ubuntu
Aug  8 20:01:48 DellE520 kernel: [  341.000593] Call Trace:
Aug  8 20:01:48 DellE520 kernel: [  341.000605]  [c10fa6c5] 
dump_header.isra.6+0x85/0xc0
Aug  8 20:01:48 DellE520 kernel: [  341.000612]  [c10fa8fc] 
oom_kill_process+0x5c/0x80
Aug  8 20:01:48 DellE520 kernel: [  341.000617]  [c10fad15] 
out_of_memory+0xc5/0x1c0
Aug  8 20:01:48 DellE520 kernel: [  341.000623]  [c10febcc] 
__alloc_pages_nodemask+0x72c/0x740
Aug  8 20:01:48 DellE520 kernel: [  341.000630]  [c10fec5c] 
__get_free_pages+0x1c/0x30
Aug  8 20:01:48 DellE520 kernel: [  341.000636]  [c103af54] 
pgd_alloc+0x74/0x250
Aug  8 20:01:48 DellE520 kernel: [  341.000642]  [c10440ca] ? 
place_entity+0x9a/0x160
Aug  8 20:01:48 DellE520 kernel: [  341.000648]  [c1058487] mm_init+0xc7/0x100
Aug  8 20:01:48 DellE520 kernel: [  341.000653]  [c1058f23] dup_mm+0xa3/0x230
Aug  8 20:01:48 DellE520 kernel: [  341.000658]  [c10597fd] 
copy_process.part.23+0x71d/0xc10
Aug  8 20:01:48 DellE520 kernel: [  341.000663]  [c1059d6e] 
copy_process+0x7e/0x90
Aug  8 20:01:48 DellE520 kernel: [  341.000668]  [c1059eb4] do_fork+0xf4/0x2c0
Aug  8 20:01:48 DellE520 kernel: [  341.000675]  [c1019874] 
sys_clone+0x34/0x40
Aug  8 20:01:48 DellE520 kernel: [  341.000682]  [c15b21d9] 
ptregs_clone+0x15/0x3c
Aug  8 20:01:48 DellE520 kernel: [  341.000687]  [c15b209f] ? 
sysenter_do_call+0x12/0x28
Aug  8 20:01:48 DellE520 kernel: [  341.000691] Mem-Info:
Aug  8 20:01:48 DellE520 kernel: [  341.000694] DMA per-cpu:
Aug  8 20:01:48 DellE520 kernel: [  341.000699] CPU0: hi:0, btch:   1 
usd:   0
Aug  8 20:01:48 DellE520 kernel: [  341.000702] CPU1: hi:0, btch:   1 
usd:   0
Aug  8 20:01:48 DellE520 kernel: [  341.000705] Normal per-cpu:
Aug  8 20:01:48 DellE520 kernel: [  341.000708] CPU0: hi:  186, btch:  31 
usd:   0
Aug  8 20:01:48 DellE520 kernel: [  341.000711] CPU1: hi:  186, btch:  31 
usd:  29
Aug  8 20:01:48 DellE520 kernel: [  341.000714] HighMem per-cpu:
Aug  8 20:01:48 DellE520 kernel: [  341.000717] CPU0: hi:  186, btch:  31 
usd:   0
Aug  8 20:01:48 DellE520 kernel: [  341.000720] CPU1: hi:  186, btch:  31 
usd: 167
Aug  8 20:01:48 DellE520 kernel: [  341.000726] active_anon:326331 
inactive_anon:81629 isolated_anon:0
Aug  8 20:01:48 DellE520 kernel: [  341.000728]  active_file:11586 
inactive_file:8659 isolated_file:0
Aug  8 20:01:48 DellE520 kernel: [  341.000729]  unevictable:0 dirty:0 
writeback:2 unstable:0
Aug  8 20:01:48 DellE520 kernel: [  341.000730]  free:25897 
slab_reclaimable:2285 slab_unreclaimable:60037
Aug  8 20:01:48 DellE520 kernel: [  341.000732]  mapped:14875 shmem:32942 
pagetables:111532 bounce:0
Aug  8 20:01:48 DellE520 kernel: [  341.000740]

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2013-08-08 Thread Paul Szabo 
Dear Christopher,

 ... test the latest upstream kernel ...

Did not I do that already in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098961/comments/18
? Is there really a need to re-test? (Yes I know that the kernel now is 
different
from what I tested... but unless you know that something related was fixed,
are you hoping for an accidental fix?)

But yes, OK, I love hard work... will do...

Cheers, Paul

-- 
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/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296
Low:865208 214080 651128
High:  412 4671081755304
-/+ buffers/cache: 1615602926060
Swap: 2920  0   2920
  and re-trying the sleep test, it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of SydneyAustralia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  psz2190 F pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
 Mixer name : 'SigmaTel STAC9227'
 Components : 'HDA:83847618,102801dd,00100201'
 Controls  : 38
 Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lono wireless extensions.
   
   eth0  no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet 
splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware1.79.1
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-35-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-04-27 (260 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog: Jan 13 06:42:46 DellE520 NetworkManager[1384]: info Unmanaged 
Device found; state CONNECTED forced. (see 
http://bugs.launchpad.net/bugs/191889)
  WpaSupplicantLog:
   
  dmi.bios.date: 03/23/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.2.1
  dmi.board.name: 0WG864
  dmi.board.vendor: Dell

[Kernel-packages] [Bug 1098961] Re: PAE regression: OOM with just a few sleeps

2013-08-06 Thread Christopher M. Penalver 
Paul Szabo, as per
http://www.dell.com/support/drivers/us/en/19/driverdetails?driverid=R157196
an update is available for your BIOS (2.4.0). If you update to this,
does it change anything?

If not, could you please both specify what happened, and provide the output of 
the following terminal command:
sudo dmidecode -s bios-version  sudo dmidecode -s bios-release-date

Thank you for your understanding.

** Tags added: bios-outdated-2.4.0 needs-upstream-testing precise
regression-potential

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

-- 
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/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
http://bugs.debian.org/695182
  and discussion on linux...@kvack.org e.g.
http://marc.info/?l=linux-mmm=135801969519193w=2
  I wonder whether
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 
i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087972 6922562395716  0  18276 427116
Low:861464  71372 790092
High:  2226508 6208841605624
-/+ buffers/cache: 2468642841108
Swap: 2920 258364   19742556
  Then it handled the sleep test
bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600  ((n=n+1)); 
((m=n%500)); if [ $m -lt 1 ]; then echo -n $n - ; date; free -l; sleep 1; fi; 
done'
  just fine, stopped only by max user processes (default setting of
  ulimit -u 23964), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
psz@DellE520:~$ uname -a
Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 
2012 i686 i686 i386 GNU/Linux
psz@DellE520:~$ free -l
 total   used   free sharedbuffers cached
Mem:   3087620 6811882406432  0 167332 352296
Low:865208 214080 651128
High:  412 4671081755304
-/+ buffers/cache: 1615602926060
Swap: 2920  0   2920
  and re-trying the sleep test, it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   p...@maths.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of SydneyAustralia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
    List of PLAYBACK Hardware Devices 
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC0:  psz2190 F pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 
not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
 Mixer name : 'SigmaTel STAC9227'
 Components : 'HDA:83847618,102801dd,00100201'
 Controls  : 38
 Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lono wireless extensions.
   
   eth0  no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet 
splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware1.79.1
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-35-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-04-27 (260 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog: Jan 13 06:42:46 DellE520 NetworkManager[1384]: info Unmanaged 
Device found; state CONNECTED forced. (see 
http://bugs.launchpad.net/bugs/191889)