[lkml]   [2019]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/3] mm: memcontrol: do not try to do swap when force empty
On Wed, Jan 2, 2019 at 12:06 PM Yang Shi <> wrote:
> The typical usecase of force empty is to try to reclaim as much as
> possible memory before offlining a memcg. Since there should be no
> attached tasks to offlining memcg, the tasks anonymous pages would have
> already been freed or uncharged.

Anon pages can come from tmpfs files as well.

> Even though anonymous pages get
> swapped out, but they still get charged to swap space. So, it sounds
> pointless to do swap for force empty.

I understand that force_empty is typically used before rmdir'ing a
memcg but it might be used differently by some users. We use this
interface to test memory reclaim behavior (anon and file).

Anyways, I am not against changing the behavior, we can adapt
internally but there might be other users using this interface


 \ /
  Last update: 2019-01-02 22:46    [W:0.109 / U:0.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site