Date: Thu, 6 Feb 2014 15:07:07 +0100
From: Michal Hocko <mhocko@suse.cz>
To: Vladimir Davydov <vdavydov@parallels.com>
Cc: akpm@linux-foundation.org, rientjes@google.com, penberg@kernel.org,
        cl@linux.com, glommer@gmail.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, devel@openvz.org
Subject: Re: [PATCH 3/8] memcg, slab: never try to merge memcg caches
Message-ID: <20140206140707.GF20269@dhcp22.suse.cz>
References: <cover.1391356789.git.vdavydov@parallels.com>
 <27c4e7d7fb6b788b66995d2523225ef2dcbc6431.1391356789.git.vdavydov@parallels.com>
 <20140204145210.GH4890@dhcp22.suse.cz>
 <52F1004B.90307@parallels.com>
 <20140204151145.GI4890@dhcp22.suse.cz>
 <52F106D7.3060802@parallels.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <52F106D7.3060802@parallels.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org

On Tue 04-02-14 19:27:19, Vladimir Davydov wrote:
[...]
> What does this patch change? Actually, it introduces no functional
> changes - it only remove the code trying to find an alias for a memcg
> cache, because it will fail anyway. So this is rather a cleanup.

But this also means that two different memcgs might share the same cache
and so the pages for that cache, no? Actually it would depend on timing
because a new page would be chaged for the current allocator.

cachep->memcg_params->memcg == memcg would prevent from such a merge
previously AFAICS, or am I still confused?
-- 
Michal Hocko
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/