Messages in this thread | | | Date | Fri, 27 Aug 2010 12:39:48 +0900 | From | Daisuke Nishimura <> | Subject | Re: cgroup: rmdir() does not complete |
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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.
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