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SubjectRe: [PATCH v2 0/5] Fix oom killer doesn't work at all if system have > gigabytes memory (aka CAI founded issue)


----- Original Message -----
> (2011/05/31 10:33), CAI Qian wrote:
> > Hello,
> > Have tested those patches rebased from KOSAKI for the latest
> > mainline.
> > It still killed random processes and recevied a panic at the end by
> > using root user. The full oom output can be found here.
> > http://people.redhat.com/qcai/oom
>
> You ran fork-bomb as root. Therefore unprivileged process was killed
> at first.
> It's no random. It's intentional and desirable. I mean
>
> - If you run the same progream as non-root, python will be killed at
> first.
> Because it consume a lot of memory than daemons.
> - If you run the same program as root, non root process and privilege
> explicit
> dropping processes (e.g. irqbalance) will be killed at first.
Hmm, at least there were some programs were root processes but were killed
first.
[ pid] ppid uid total_vm rss swap score_adj name
[ 5720] 5353 0 24421 257 0 0 sshd
[ 5353] 1 0 15998 189 0 0 sshd
[ 5451] 1 0 19648 235 0 0 master
[ 1626] 1 0 2287 129 0 0 dhclient
>
> Look, your log says, highest oom score process was killed first.
>
> Out of memory: Kill process 5462 (abrtd) points:393 total-vm:262300kB,
> anon-rss:1024kB, file-rss:0kB
> Out of memory: Kill process 5277 (hald) points:303 total-vm:25444kB,
> anon-rss:1116kB, file-rss:0kB
> Out of memory: Kill process 5720 (sshd) points:258 total-vm:97684kB,
> anon-rss:824kB, file-rss:0kB
> Out of memory: Kill process 5457 (pickup) points:236 total-vm:78672kB,
> anon-rss:768kB, file-rss:0kB
> Out of memory: Kill process 5451 (master) points:235 total-vm:78592kB,
> anon-rss:796kB, file-rss:0kB
> Out of memory: Kill process 5458 (qmgr) points:233 total-vm:78740kB,
> anon-rss:764kB, file-rss:0kB
> Out of memory: Kill process 5353 (sshd) points:189 total-vm:63992kB,
> anon-rss:620kB, file-rss:0kB
> Out of memory: Kill process 1626 (dhclient) points:129
> total-vm:9148kB, anon-rss:484kB, file-rss:0kB
>
>
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