Re: [RFC 5/5] Memory controller soft limit reclaim on contention

[Balbir Singh]

KOSAKI Motohiro wrote:
> yes, memcg used only one page.
> but mem_cgroup_reclaim_on_contention() reclaim for generic alloc_pages(), instead for memcg.
> we can't assume memcg usage.
> isn't it?

Yes, but the reclaim is from memcg pages (memcg groups that are over their soft
limit). I am not sure if I understand your point? If your claim is that we don't
free up pages of at-least order (as desired by __alloc_pages_internal()), that
is correct. We can ensure that we do a pass over memcg and generic zone LRU.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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