lkml.org 
[lkml]   [2019]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] mm: memcg/slab: wait for !root kmem_cache refcnt killing on root kmem_cache destruction
On Tue 26-11-19 18:41:41, Roman Gushchin wrote:
> On Tue, Nov 26, 2019 at 10:29:18AM +0100, Michal Hocko wrote:
> > On Mon 25-11-19 10:54:53, Roman Gushchin wrote:
[...]
> > > So in a rare case when not all children kmem_caches are destroyed
> > > at the moment when the root kmem_cache is about to be gone, we need
> > > to wait another rcu grace period before destroying the root
> > > kmem_cache.
> >
> > Could you explain how rare this really is please?
>
> It seems that we don't destroy root kmem_caches with enabled memcg
> accounting that often, but maybe I'm biased here.

So this happens each time a root kmem_cache is destroyed? Which would
imply that only dynamically created ones?
--
Michal Hocko
SUSE Labs

\
 
 \ /
  Last update: 2019-11-27 13:32    [W:0.092 / U:0.868 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site