linux-kernel - Re: [PATCH -V4 04/10] memcg: Add HugeTLB extension

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Message-ID: <4F672165.4050506@jp.fujitsu.com>
Date:	Mon, 19 Mar 2012 21:07:01 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Glauber Costa <glommer@...allels.com>
CC:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	linux-mm@...ck.org, mgorman@...e.de, dhillf@...il.com,
	aarcange@...hat.com, mhocko@...e.cz, akpm@...ux-foundation.org,
	hannes@...xchg.org, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org
Subject: Re: [PATCH -V4 04/10] memcg: Add HugeTLB extension

(2012/03/19 20:39), Glauber Costa wrote:

> On 03/19/2012 11:00 AM, KAMEZAWA Hiroyuki wrote:
>> (2012/03/19 15:52), Aneesh Kumar K.V wrote:
>>
>>> On Mon, 19 Mar 2012 11:38:38 +0900, KAMEZAWA Hiroyuki<kamezawa.hiroyu@...fujitsu.com>  wrote:
>>>> (2012/03/17 2:39), Aneesh Kumar K.V wrote:
>>>>
>>>>> From: "Aneesh Kumar K.V"<aneesh.kumar@...ux.vnet.ibm.com>
>>>>>
>>>>> This patch implements a memcg extension that allows us to control
>>>>> HugeTLB allocations via memory controller.
>>>>>
>>>>
>>>>
>>>> If you write some details here, it will be helpful for review and
>>>> seeing log after merge.
>>>
>>> Will add more info.
>>>
>>>>
>>>>
>>>>> Signed-off-by: Aneesh Kumar K.V<aneesh.kumar@...ux.vnet.ibm.com>
>>>>> ---
>>>>>   include/linux/hugetlb.h    |    1 +
>>>>>   include/linux/memcontrol.h |   42 +++++++++++++
>>>>>   init/Kconfig               |    8 +++
>>>>>   mm/hugetlb.c               |    2 +-
>>>>>   mm/memcontrol.c            |  138 ++++++++++++++++++++++++++++++++++++++++++++
>>>>>   5 files changed, 190 insertions(+), 1 deletions(-)
>>>
>>> ....
>>>
>>>>> +#ifdef CONFIG_MEM_RES_CTLR_HUGETLB
>>>>> +static bool mem_cgroup_have_hugetlb_usage(struct mem_cgroup *memcg)
>>>>> +{
>>>>> +	int idx;
>>>>> +	for (idx = 0; idx<  hugetlb_max_hstate; idx++) {
>>>>> +		if (memcg->hugepage[idx].usage>  0)
>>>>> +			return 1;
>>>>> +	}
>>>>> +	return 0;
>>>>> +}
>>>>
>>>>
>>>> Please use res_counter_read_u64() rather than reading the value directly.
>>>>
>>>
>>> The open-coded variant is mostly derived from mem_cgroup_force_empty. I
>>> have updated the patch to use res_counter_read_u64.
>>>
>>
>> Ah, ok. it's(maybe) my bad. I'll schedule a fix.
>>
> Kame,
> 
> I actually have it ready here. I can submit it if you want.
> 


That's good :) please post.
(But I'm sorry I'll be absent tomorrow.)

Thanks,
-Kame

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