Re: [PATCH] mm: memcontrol: reset memory.low on css offline

Hello,

On Mon, Feb 29, 2016 at 03:02:55PM -0500, Johannes Weiner wrote:

quoted

To fix this, let's reset memory.low on css offline.

We already have mem_cgroup_css_reset() for soft-offlining a css - when
the css is asked to be disabled but another subsystem still uses it.
Can we just call that function during offline as well? The css can be
around for quite a bit after the user deleted it. Eliminating *any*
user-supplied configurations and zapping it back to defaults makes
sense in general, so that we never have to worry about any remnants.

Hmmm... I wonder whether the behavior can be a bit surprising and it
could be better to simply let memcg offline callback to call the reset
function explicitly.  No big deal either way tho.  Please feel free to
send a patch.

Thanks.

-- 
tejun