linux-kernel - Re: [PATCH -mm] slab: use cgroup ino for naming per memcg caches

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Message-ID: <alpine.DEB.2.11.1504080845200.13120@gentwo.org>
Date:	Wed, 8 Apr 2015 08:46:22 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Vladimir Davydov <vdavydov@...allels.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>, linux-mm@...ck.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm] slab: use cgroup ino for naming per memcg caches

On Wed, 8 Apr 2015, Vladimir Davydov wrote:

> has its own copy of kmem cache. What if we decide to share the same kmem
> cache among all memory cgroups one day? Of course, this will hardly ever
> happen, but it is an alternative approach to implementing the same

/sys/kernel/slab already supports the use of symlinks. And both SLAB and
SLUB do slab merging which means effectively an aliasing of multiple slab
caches to the same name.

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