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Date: Tue, 8 Dec 2015 08:15:21 -0600 (CST)
From: Christoph Lameter <cl@linux.com>
Subject: Re: [RFC PATCH 2/2] slab: implement bulk free in SLAB allocator
In-Reply-To: <20151208141211.GH11488@esperanza>
Message-ID: <alpine.DEB.2.20.1512080814350.20678@east.gentwo.org>
References: <20151203155600.3589.86568.stgit@firesoul> <20151203155736.3589.67424.stgit@firesoul> <alpine.DEB.2.20.1512041111180.21819@east.gentwo.org> <20151207122549.109e82db@redhat.com> <alpine.DEB.2.20.1512070858140.8762@east.gentwo.org>
 <20151208141211.GH11488@esperanza>
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To: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>, linux-mm@kvack.org, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Linus Torvalds <torvalds@linux-foundation.org>, Andrew Morton <akpm@linux-foundation.org>

On Tue, 8 Dec 2015, Vladimir Davydov wrote:

> If producers are represented by different processes, they can belong to
> different memory cgroups, so that objects passed to the consumer will
> come from different kmem caches (per memcg caches), although they are
> all of the same kind. This means, we must call cache_from_obj() on each
> object passed to kmem_cache_free_bulk() in order to free each object to
> the cache it was allocated from.

The we should change the API so that we do not specify kmem_cache on bulk
free. Do it like kfree without any cache spec.

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