No oom-killer event with v5.0 kernel. Linux version 5.0.0-050000rc1-generic (kernel@tangerine) (gcc version 8.2.0 (Ubuntu 8.2.0-12ubuntu1)) #201901062130 SMP Mon Jan 7 02:32:47 UTC 2019
Possible explanations: Scenario #1) There was a kernel bug and it is fixed in v5.0. Or, Scenario #2) Compiz requests a large chunk of memory in certain situations that did not occur when testing with the v5.0 kernel. All of the oom-killer events here were compiz. They may not have occurred when testing with the v5.0 kernel either because testing was limited in duration, or because of differences between the testing environment and the production environment. Our testing with the v5.0 kernel was done at 800x600 resolution, no proprietary graphics driver. The oom-killer events described in this bug report occurred at 1920 x 1080 resolution with proprietary nvidia graphics driver. There may or may not be a kernel bug and it may or may not be fixed in v5.0. Moving forward we will most likely switch production to open source nouveau graphics driver and/or Xenial LTS HWE and/or fully upgrade to 18.04.1 Bionic. I am going to leave this bug marked "Incomplete" due to the differences between our v5.0 kernel test environment and our production environment. Attached are some notes that will be useful to me if I ever come back here. ** Attachment added: "Notes on how to install latest upstream kernel." https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811093/+attachment/5233365/+files/HowTo.txt -- 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/1811093 Title: Bogus "Out of Memory" compiz invoked oom-killer Status in linux package in Ubuntu: Incomplete Bug description: This has happened five times in the past week (four times in the past 36 hours): kernel: compiz invoked oom-killer: There is plenty of free core memory and almost no swap in use when it happens. This is Xenial with kernel version is 4.4.0-141, which contains fix to previously reported bug #1655842 "Out of Memory" oom-killer bug. I only have one week of logs to go by, which contain five occurrences. It has happened four times in the past 36 hours. Sometimes it happens right after logging into the unity / lighdm desktop (three out of five times), but not always. In four out of five occurrences a postgres job was running and oom-killer killed postgres. In the one other instance, postgres was quietly idle in the background and oom-killer killed Thunderbird. Kernel messages in syslog from five occurrences: compiz invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=2, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=2, oom_score_adj=0 compiz invoked oom-killer: gfp_mask=0x24040c0, order=3, oom_score_adj=0 Additional info: $> lsb_release -rd Description: Ubuntu 16.04.5 LTS Release: 16.04 $> cat /proc/version_signature Ubuntu 4.4.0-141.167-generic 4.4.162 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811093/+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
