Hmm, so what is it that makes it behave that way? If I force Perkeep
to OOM (not on systemd), it clearly shows up in the output here. Is my
kernel not behaving the same way because Perkeep is not running
through systemd?


On Sat, 1 Sep 2018 at 19:44, Brad Fitzpatrick <[email protected]> wrote:
>
> The kernel is sending it an uncatchable SIGKILL. It has no chance to log.
>
> On Sat, Sep 1, 2018, 7:18 PM Mathieu Lonjaret <[email protected]> 
> wrote:
>>
>> And you're maintaining that in 'journalctl -u perkeep', at the time of
>> perkeep's death, there's no such sign of the OOM? I'm asking, because
>> it usually is pretty obvious just by looking at perkeep's output.
>> If that's the case, it's something to keep  in mind for future
>> debugging of Perkeep under systemd.
>>
>> On Sat, 1 Sep 2018 at 10:09, Niklas Merz <[email protected]> wrote:
>> >
>> > So it failed again.
>> >
>> > The exit code is:
>> > Aug 28 20:21:16 stuff systemd[1]: Started Perkeep Server.
>> > -- Subject: Unit perkeep.service has finished start-up
>> > -- Defined-By: systemd
>> > -- Support: https://www.debian.org/support
>> > --
>> > -- Unit perkeep.service has finished starting up.
>> > --
>> > -- The start-up result is done.
>> > Aug 30 16:49:23 stuff systemd[1]: perkeep.service: Main process exited, 
>> > code=killed, status=9/KILL
>> > Aug 30 16:49:23 stuff systemd[1]: perkeep.service: Unit entered failed 
>> > state.
>> > Aug 30 16:49:23 stuff systemd[1]: perkeep.service: Failed with result 
>> > 'signal'.
>> >
>> > $ dmesg | grep perkeepd
>> >
>> > [9339544.204149] perkeepd invoked oom-killer: 
>> > gfp_mask=0x14000c0(GFP_KERNEL), nodemask=(null),  order=0, oom_score_adj=0
>> > [9339544.204153] perkeepd cpuset=ns mems_allowed=0
>> > [9339544.204156] CPU: 3 PID: 11500 Comm: perkeepd Tainted: P           O   
>> >  4.13.16-2-pve #1
>> > [9339544.204447] [11488]  1000 11488   459372   282365     638       6     
>> >    0             0 perkeepd
>> > [9339544.204450] Memory cgroup out of memory: Kill process 11488 
>> > (perkeepd) score 539 or sacrifice child
>> > [9339544.205419] Killed process 11488 (perkeepd) total-vm:1837488kB, 
>> > anon-rss:1129460kB, file-rss:0kB, shmem-rss:0kB
>> > [9339544.258384] oom_reaper: reaped process 11488 (perkeepd), now 
>> > anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
>> > [9340611.483660] [15711]  1000 15711   682515   276764     707       7     
>> >    0             0 perkeepd
>> > [9340611.483664] Memory cgroup out of memory: Kill process 15711 
>> > (perkeepd) score 529 or sacrifice child
>> > [9340611.484713] Killed process 15711 (perkeepd) total-vm:2730060kB, 
>> > anon-rss:1107056kB, file-rss:0kB, shmem-rss:0kB
>> > [9341096.168476] perkeepd invoked oom-killer: 
>> > gfp_mask=0x14000c0(GFP_KERNEL), nodemask=(null),  order=0, oom_score_adj=0
>> > [9341096.168478] perkeepd cpuset=ns mems_allowed=0
>> > [9341096.168482] CPU: 3 PID: 18250 Comm: perkeepd Tainted: P           O   
>> >  4.13.16-2-pve #1
>> > [9341096.168836] [18246]  1000 18246   421195   280089     619       6     
>> >    0             0 perkeepd
>> > [9341096.168842] Memory cgroup out of memory: Kill process 18246 
>> > (perkeepd) score 535 or sacrifice child
>> > [9341096.169788] Killed process 18246 (perkeepd) total-vm:1684780kB, 
>> > anon-rss:1120356kB, file-rss:0kB, shmem-rss:0kB
>> > [9341096.228024] oom_reaper: reaped process 18246 (perkeepd), now 
>> > anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
>> > [9501543.900541] perkeepd invoked oom-killer: 
>> > gfp_mask=0x14000c0(GFP_KERNEL), nodemask=(null),  order=0, oom_score_adj=0
>> > [9501543.900543] perkeepd cpuset=ns mems_allowed=0
>> > [9501543.900547] CPU: 3 PID: 22466 Comm: perkeepd Tainted: P           O   
>> >  4.13.16-2-pve #1
>> > [9501543.900832] [22465]  1000 22465   412239   265550     648       6    
>> > 11826             0 perkeepd
>> > [9501543.900845] Memory cgroup out of memory: Kill process 22465 
>> > (perkeepd) score 530 or sacrifice child
>> > [9501543.901793] Killed process 22465 (perkeepd) total-vm:1648956kB, 
>> > anon-rss:1062200kB, file-rss:0kB, shmem-rss:0kB
>> > [9501543.956730] oom_reaper: reaped process 22465 (perkeepd), now 
>> > anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
>> >
>> > So it runs out of memory right? I will allocate more RAM to this VM and 
>> > try running it again.
>> >
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