Re: [patch] mm, memcg: add oom killer delay

[Michal Hocko]

On Fri 31-05-13 03:22:59, David Rientjes wrote:
> On Fri, 31 May 2013, Michal Hocko wrote:
[...]
> > > If the oom notifier is in the oom cgroup, it may not be able to       
> > > successfully read the memcg "tasks" file to even determine the set of 
> > > eligible processes.
> > 
> > It would have to use preallocated buffer and have mlocked all the memory
> > that will be used during oom event.
> > 
> 
> Wrong, the kernel itself allocates memory when reading this information 
> and that would fail in an oom memcg.

But that memory is not charged to a memcg, is it? So unless you are
heading towards global OOM you should be safe.

-- 
Michal Hocko
SUSE Labs
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