Re: [rfc patch 3/6] mm: memcg-aware global reclaim

[Michal Hocko]

On Fri 13-05-11 12:28:58, Johannes Weiner wrote:
> On Fri, May 13, 2011 at 11:53:08AM +0200, Michal Hocko wrote:
> > On Thu 12-05-11 16:53:55, Johannes Weiner wrote:
> > > A page charged to a memcg is linked to a lru list specific to that
> > > memcg.  At the same time, traditional global reclaim is obvlivious to
> > > memcgs, and all the pages are also linked to a global per-zone list.
> > > 
> > > This patch changes traditional global reclaim to iterate over all
> > > existing memcgs, so that it no longer relies on the global list being
> > > present.
> > 
> > At LSF we have discussed that we should keep a list of over-(soft)limit
> > cgroups in a list which would be the first target for reclaiming (in
> > round-robin fashion). If we are note able to reclaim enough from those
> > (the list becomes empty) we should fallback to the all groups reclaim
> > (what you did in this patchset).
> 
> This would be on top or instead of 6/6.  This, 3/6, is indepent of
> soft limit reclaim.  It is mainly in preparation to remove the global
> LRU.

OK.

-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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