linux-kernel - Re: [PATCH v6 3/8] foundations of per-cgroup memory pressure controlling.

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Message-ID: <4E96A091.4000705@parallels.com>
Date:	Thu, 13 Oct 2011 12:25:53 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	<linux-kernel@...r.kernel.org>, <paul@...lmenage.org>,
	<lizf@...fujitsu.com>, <ebiederm@...ssion.com>,
	<davem@...emloft.net>, <gthelen@...gle.com>,
	<netdev@...r.kernel.org>, <linux-mm@...ck.org>,
	<kirill@...temov.name>, <avagin@...allels.com>, <devel@...nvz.org>
Subject: Re: [PATCH v6 3/8] foundations of per-cgroup memory pressure controlling.

On 10/13/2011 09:53 AM, KAMEZAWA Hiroyuki wrote:
> On Mon, 10 Oct 2011 14:24:23 +0400
> Glauber Costa<glommer@...allels.com>  wrote:
>
>> This patch converts struct sock fields memory_pressure,
>> memory_allocated, sockets_allocated, and sysctl_mem (now prot_mem)
>> to function pointers, receiving a struct mem_cgroup parameter.
>>
>> enter_memory_pressure is kept the same, since all its callers
>> have socket a context, and the kmem_cgroup can be derived from
>> the socket itself.
>>
>> To keep things working, the patch convert all users of those fields
>> to use acessor functions.
>>
>> In my benchmarks I didn't see a significant performance difference
>> with this patch applied compared to a baseline (around 1 % diff, thus
>> inside error margin).
>>
>> Signed-off-by: Glauber Costa<glommer@...allels.com>
>> CC: David S. Miller<davem@...emloft.net>
>> CC: Hiroyouki Kamezawa<kamezawa.hiroyu@...fujitsu.com>
>> CC: Eric W. Biederman<ebiederm@...ssion.com>
>
> Reviewed-by: KAMEZAWA Hiroyuki<kamezawa.hiroyu@...fujitsu.com>
>
> a nitpick.
>
>
>>   #ifdef CONFIG_INET
>> +enum {
>> +	UNDER_LIMIT,
>> +	OVER_LIMIT,
>> +};
>> +
>
> It may be better to move this to res_counter.h or memcontrol.h
>
Sorry Kame,

It is in memcontrol.h already. What exactly do you mean here ?



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