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

[Johannes Weiner]

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.
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