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SubjectRe: [BUGFIX][PATCH] memcg fix wake up in oom wait queue
On Fri, 4 Jun 2010 10:08:11 +0900
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> wrote:

> On Thu, 3 Jun 2010 17:23:53 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > Very sorry that my test wasn't enough and delayed.
> >
> > ==
> > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> >
> > OOM-waitqueue should be waken up when oom_disable is canceled.
> > This is a fix for
> > memcg-oom-kill-disable-and-oom-status.patch
> >
> > How to test:
> > Create a cgroup A...
> > 1. set memory.limit and memory.memsw.limit to be small value
> > 2. echo 1 > /cgroup/A/memory.oom_control, this disables oom-kill.
> > 3. run a program which must cause OOM.
> >
> > A program executed in 3 will sleep by oom_waiqueue in memcg.
> > Then, how to wake it up is problem.
> >
> > 1. echo 0 > /cgroup/A/memory.oom_control (enable OOM-killer)
> > 2. echo big mem > /cgroup/A/memory.memsw.limit_in_bytes(allow more swap)
> > etc..
> >
> > Without the patch, a task in slept can not be waken up.
> >
>
> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
>
Thanks. I'll try to rebase this onto the latest mmotm.

-Kame



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