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SubjectRe: cgroup: rmdir() does not complete
On Fri, 10 Sep 2010, KAMEZAWA Hiroyuki wrote:

> On Fri, 10 Sep 2010 00:04:31 +0100 (BST)
> Mark Hills <mark@pogo.org.uk> wrote:
> > The report on the spinning process (23586) is dominated by calls from
> > mem_cgroup_force_empty.
> >
> > It seems to show lru_add_drain_all and drain_all_stock_sync are causing
> > the load (I assume drain_all_stock_sync has been optimised out). But I
> > don't think this is as important as what causes the spin.
> >
>
> I noticed you use FUSE and it seems there is a problem in FUSE v.s. memcg.
> I wrote a patch (onto 2.6.36 but can be applied..)
>
> Could you try this ? I'm sorry I don't use FUSE system and can't test
> right now.

What makes you conclude that FUSE is in use? I do not think this is the
case. Or do you mean that it is a problem that the kernel is built with
FUSE support?

I _can_ test the patch, but I still cannot reliably reproduce the problem
so it will be hard to conclude whether the patch works or not. Is there a
way to build a test case for this?

Thanks for your help

--
Mark


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