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From: "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>
To: "Daisuke Nishimura" <nishimura@mxp.nes.nec.co.jp>
Cc: "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"balbir@linux.vnet.ibm.com" <balbir@linux.vnet.ibm.com>,
	"menage@google.com" <menage@google.com>,
	nishimura@mxp.nes.nec.co.jp
Subject: Re: [RFC][PATCH 4/6] memcg : swap cgroup
Date: Thu, 6 Nov 2008 21:44:21 +0900 (JST)	[thread overview]
Message-ID: <29542.10.75.179.61.1225975461.squirrel@webmail-b.css.fujitsu.com> (raw)
In-Reply-To: <20081106202534.80e5cf0a.nishimura@mxp.nes.nec.co.jp>

Daisuke Nishimura said:
> On Wed, 5 Nov 2008 17:21:41 +0900, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@jp.fujitsu.com> wrote:
>> Note1: In this, we use pointer to record information and this means
>>       8bytes per swap entry. I think we can reduce this when we
>>       create "id of cgroup" in the range of 0-65535 or 0-255.
>>
>> Note2: array of swap_cgroup is allocated from HIGHMEM. maybe good for
>> x86-32.
>>
>> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
>>
>>  include/linux/page_cgroup.h |   35 +++++++
>>  mm/page_cgroup.c            |  201
>> ++++++++++++++++++++++++++++++++++++++++++++
>>  mm/swapfile.c               |    8 +
>>  3 files changed, 244 insertions(+)
>>
> Is there any reason why they are defined not in memcontrol.[ch]
> but in page_cgroup.[ch]?
>
no strong reason. just because this is not core logic for acccounting.
do you want to see this in memcontrol.c ?

>> +void swap_cgroup_swapoff(int type)
>> +{
>> +	int i;
>> +	struct swap_cgroup_ctrl *ctrl;
>> +
>> +	if (!do_swap_account)
>> +		return;
>> +
>> +	mutex_lock(&swap_cgroup_mutex);
>> +	if (ctrl->map) {
>> +		ctrl = &swap_cgroup_ctrl[type];
> This line should be before "if (ctrl->map)"(otherwise "ctrl" will be
> undefined!).
>
Oh....maybe refresh mis...brame me.

Thanks,
-Kame



  reply	other threads:[~2008-11-06 12:44 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-05  8:16 [RFC][PATCH 0/6] memcg updates (05/Nov) KAMEZAWA Hiroyuki
2008-11-05  8:18 ` [RFC][PATCH 1/6] memcg: move all accounts to parent at rmdir() KAMEZAWA Hiroyuki
2008-11-05  8:20 ` [RFC][PATCH 2/6] memcg: handle swap cache KAMEZAWA Hiroyuki
2008-11-07  8:53   ` Daisuke Nishimura
2008-11-07  9:13     ` KAMEZAWA Hiroyuki
2008-11-05  8:20 ` [RFC][PATCH 3/6] memcg : mem+swap controller kconfig KAMEZAWA Hiroyuki
2008-11-06 11:07   ` Daisuke Nishimura
2008-11-05  8:21 ` [RFC][PATCH 4/6] memcg : swap cgroup KAMEZAWA Hiroyuki
2008-11-06 11:25   ` Daisuke Nishimura
2008-11-06 12:44     ` KAMEZAWA Hiroyuki [this message]
2008-11-07  1:19       ` Daisuke Nishimura
2008-11-05  8:23 ` [RFC][PATCH 5/6] memcg: mem+swap controller KAMEZAWA Hiroyuki
2008-11-07  9:02   ` Daisuke Nishimura
2008-11-07  9:19     ` KAMEZAWA Hiroyuki
2008-11-07 13:30       ` Daisuke Nishimura
2008-11-07 13:21   ` Daisuke Nishimura
2008-11-10  4:30   ` Daisuke Nishimura
2008-11-10  7:03     ` KAMEZAWA Hiroyuki
2008-11-05  8:24 ` [RFC][PATCH 6/6] memcg: synchronized LRU KAMEZAWA Hiroyuki
2008-11-06  6:54 ` [RFC][PATCH 0/6] memcg updates (05/Nov) Balbir Singh
2008-11-06  7:03   ` KAMEZAWA Hiroyuki
2008-11-06 10:41   ` [RFC][PATCH 7/6] memcg: add atribute (for change bahavior of rmdir) KAMEZAWA Hiroyuki
2008-11-06 11:59     ` Hugh Dickins
2008-11-06 12:47       ` [RFC][PATCH 7/6] memcg: add atribute (for change bahavior ofrmdir) KAMEZAWA Hiroyuki
2008-11-06 13:46     ` [RFC][PATCH 7/6] memcg: add atribute (for change bahavior of rmdir) Balbir Singh
2008-11-06 14:30       ` [RFC][PATCH 7/6] memcg: add atribute (for change bahavior ofrmdir) KAMEZAWA Hiroyuki
2008-11-07  1:12         ` KAMEZAWA Hiroyuki

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