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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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