lkml.org 
[lkml]   [2010]   [Aug]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: cgroup: rmdir() does not complete
On Fri, 27 Aug 2010 11:35:06 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> On Fri, 27 Aug 2010 09:56:39 +0900
> Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> wrote:
>
> > > Or is it likely to be some other cause, and how best to find it?
> > >
> > What cgroup subsystem did you mount where the directory existed you tried
> > to rmdir() first ?
> > If you mounted several subsystems on the same hierarchy, can you mount them
> > separately to narrow down the cause ?
> >
>
> It seems I can reproduce the issue on mmotm-0811, too.
>
> try this.
>
> Here, memory cgroup is mounted at /cgroups.
> ==
> #!/bin/bash -x
>
> while sleep 1; do
> date
> mkdir /cgroups/test
> echo 0 > /cgroups/test/tasks
> echo 300M > /cgroups/test/memory.limit_in_bytes
> cat /proc/self/cgroup
> dd if=/dev/zero of=./tmpfile bs=4096 count=100000
> echo 0 > /cgroups/tasks
> cat /proc/self/cgroup
> rmdir /cgroups/test
> rm ./tmpfile
> done
> ==
>
> hangs at rmdir. I'm no investigating force_empty.
>
Thank you very much for your information.

Some questions.

Is "tmpfile" created on a normal filesystem(e.g. ext3) or tmpfs ?
And, how long does it likely to take to cause this problem ?
I've run it on RHEL6-based kernel/ext3 for about one hour, but
I cannot reproduce it yet.


Thanks,
Daisuke Nishimura.


\
 
 \ /
  Last update: 2010-08-27 05:45    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site