Re: [PATCH] memcg: deprecate memory.force_empty knob

[Michal Hocko]

On Mon 19-05-14 16:02:48, Michal Hocko wrote:
> On Fri 16-05-14 15:00:16, Greg Thelen wrote:
[...]
> > -- First, demonstrate that just rmdir, without memory.force_empty,
> >    temporarily hides reparented child memory stats.
> > 
> > $ /test
> > p/memory.stat:rss 0
> > p/memory.stat:total_rss 69632
> > p/c/memory.stat:rss 69632
> > p/c/memory.stat:total_rss 69632
> > For a small time the p/c memory has not been reparented to p.
> > p/memory.stat:rss 0
> > p/memory.stat:total_rss 0
> 
> OK, this is a bug. Our iterators skip the children because css_tryget
> fails on it but css_offline still not done.

Or use the cgroups iterator directly. Which would be even easier to fix.
-- 
Michal Hocko
SUSE Labs
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