linux-kernel - Re: [PATCH -mm 1/8] memcg: cleanup memcg_cache

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Message-ID: <alpine.DEB.2.10.1405300931140.11943@gentwo.org>
Date:	Fri, 30 May 2014 09:31:26 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Vladimir Davydov <vdavydov@...allels.com>
cc:	akpm@...ux-foundation.org, hannes@...xchg.org, mhocko@...e.cz,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH -mm 1/8] memcg: cleanup memcg_cache_params refcnt usage

On Fri, 30 May 2014, Vladimir Davydov wrote:

> Currently, we count the number of pages allocated to a per memcg cache
> in memcg_cache_params->nr_pages. We only use this counter to find out if
> the cache is empty and can be destroyed. So let's rename it to refcnt
> and make it count not pages, but slabs so that we can use atomic_inc/dec
> instead of atomic_add/sub in memcg_charge/uncharge_slab.

Acked-by: Christoph Lameter <cl@...ux.com>
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