linux-kernel - Re: [PATCH-next v2] mm, memcg: Add ":deact" tag for reparented kmem caches in memcg

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Date:   Tue, 2 Jul 2019 12:12:07 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     Waiman Long <longman@...hat.com>
cc:     Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Michal Hocko <mhocko@...nel.org>,
        Roman Gushchin <guro@...com>,
        Johannes Weiner <hannes@...xchg.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Vladimir Davydov <vdavydov.dev@...il.com>
Subject: Re: [PATCH-next v2] mm, memcg: Add ":deact" tag for reparented kmem
 caches in memcg_slabinfo

On Thu, 27 Jun 2019, Waiman Long wrote:

> With Roman's kmem cache reparent patch, multiple kmem caches of the same
> type can be seen attached to the same memcg id. All of them, except
> maybe one, are reparent'ed kmem caches. It can be useful to tag those
> reparented caches by adding a new slab flag "SLAB_DEACTIVATED" to those
> kmem caches that will be reparent'ed if it cannot be destroyed completely.
> 
> For the reparent'ed memcg kmem caches, the tag ":deact" will now be
> shown in <debugfs>/memcg_slabinfo.
> 
> [v2: Set the flag in the common code as suggested by Roman.]
> 
> Signed-off-by: Waiman Long <longman@...hat.com>
> Reviewed-by: Shakeel Butt <shakeelb@...gle.com>
> Acked-by: Roman Gushchin <guro@...com>

Acked-by: David Rientjes <rientjes@...gle.com>