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

[KOSAKI Motohiro]

> > 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.

exactly.
Thank you.


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