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Message #158838
[Bug 1510196] Re: OOM killer causes complete system freezes
Sorry for not replying, the notification mails somehow ended up
unnoticed in my Spam folder.
I have already upgraded the affected server to the newer Vivid Kernel
3.19 to solve this issue.
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https://bugs.launchpad.net/bugs/1510196
Title:
OOM killer causes complete system freezes
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Trusty:
Incomplete
Bug description:
A race condition in the Linux kernel randomly causes complete system
freezes when the system or a cgroup runs out of memory and the OOM
killer is invoked. I ran into this issue twice during the last 2 weeks
(Ubuntu 14.04.3 LTS, kernel version 3.13.0-65.106), in my case it was
an LXC cgroup running out of memory and not the system itself. The
system log files did not show any errors, but there were repeating
error messages on the system console (see attached screenshot).
When searching for these error messages I found the following website
that provides more information about the cause and a possible solution
to fix it: https://community.nitrous.io/posts/stability-and-a-linux-
oom-killer-bug
I did not see any OOM killer related messages in the system logs at
the time the freeze happened, but one of the LXC containers running on
that server went out of memory exactly at that time, so I guess this
must be related.
I was not able to reproduce the error in a testing environment as it
seems to be a race condition between several processes that does not
occur every time. However, I have applied the 3 suggested commits for
mm/oom_kill.c
(https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=4d4048be8a93769350efa31d2482a038b7de73d0&qt=range&q=0c740d0afc3bff0a097ad03a1c8df92757516f5c...4d4048be8a93769350efa31d2482a038b7de73d0)
from kernel 3.14 to the current trusty kernel, built the patched
kernel and it seems to work. Could this bugfix for the OOM killer be
backported to the official trusty kernel?
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-66-generic 3.13.0-66.108
ProcVersionSignature: Ubuntu 3.13.0-66.108-generic 3.13.11-ckt27
Uname: Linux 3.13.0-66-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Oct 23 09:12 seq
crw-rw---- 1 root audio 116, 33 Oct 23 09:12 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.16
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Mon Oct 26 12:19:55 2015
HibernationDevice: RESUME=UUID=728105e7-2f6b-46fd-bf56-1bf67239adea
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Supermicro H8DGT
PciMultimedia:
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-66-generic root=UUID=08db4f0e-59c5-4ffd-a34c-866e3fe126c5 ro nomdmonddf nomdmonisw
RelatedPackageVersions:
linux-restricted-modules-3.13.0-66-generic N/A
linux-backports-modules-3.13.0-66-generic N/A
linux-firmware 1.127.15
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/07/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3.0a
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: H8DGT-HF
dmi.board.vendor: Supermicro
dmi.board.version: 1.21A
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 17
dmi.chassis.vendor: SGI.COM
dmi.chassis.version: 1234567890
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3.0a:bd05/07/2013:svnSupermicro:pnH8DGT:pvr1234567890:rvnSupermicro:rnH8DGT-HF:rvr1.21A:cvnSGI.COM:ct17:cvr1234567890:
dmi.product.name: H8DGT
dmi.product.version: 1234567890
dmi.sys.vendor: Supermicro
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References