Re: [PATCH 5/5] mm: consider per-zone inactive ratio to deactivate
From: Mel Gorman
Date: Thu Jul 21 2016 - 04:08:49 EST
On Thu, Jul 21, 2016 at 02:30:17PM +0900, Minchan Kim wrote:
> > The problem is due to the active deactivation logic in inactive_list_is_low.
> > Node 0 active_anon:404412kB inactive_anon:409040kB
> > IOW, (inactive_anon of node * inactive_ratio > active_anon of node) due to
> > highmem anonymous stat so VM never deactivates normal zone's anonymous pages.
> > This patch is a modified version of Minchan's original solution but based
> > upon it. The problem with Minchan's patch is that it didn't take memcg
> > into account and any low zone with an imbalanced list could force a rotation.
> Could you explan why we should consider memcg here?
It already was and there is no good reason to ignore it if it's memcg
> > In this page, a zone-constrained global reclaim will rotate the list if
I'll fix it.