On Tue, 28 Jun 2011 10:08:47 +0200
Michal Hocko <mhocko@xxxxxxx> wrote:
> I am sorry, that I am answering that late but I didn't get to this
> sooner.
>
> On Mon 27-06-11 16:18:12, Andrew Morton wrote:
> > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
> >
> > commit d149e3b ("memcg: add the soft_limit reclaim in global direct
> > reclaim") adds a softlimit hook to shrink_zones(). By this, soft limit is
> > called as
> >
> > try_to_free_pages()
> > do_try_to_free_pages()
> > shrink_zones()
> > mem_cgroup_soft_limit_reclaim()
> >
> > Then, direct reclaim is memcg softlimit hint aware, now.
> >
> > But, the memory cgroup's "limit" path can call softlimit shrinker.
> >
> > try_to_free_mem_cgroup_pages()
> > do_try_to_free_pages()
> > shrink_zones()
> > mem_cgroup_soft_limit_reclaim()
> >
> > This will cause a global reclaim when a memcg hits limit.
>
> Sorry, I do not get it. How does it cause the global reclaim? Did you
> mean soft reclaim?
>
yes. soft reclaim does global reclaim (in some means).
Thanks,
-Kame
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