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From: "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>
To: balbir@linux.vnet.ibm.com
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>,
	"nishimura@mxp.nes.nec.co.jp" <nishimura@mxp.nes.nec.co.jp>
Subject: Re: [RFC][PATCH 2/5] memcg: uncharge in batched manner
Date: Mon, 31 Aug 2009 21:14:10 +0900 (JST)	[thread overview]
Message-ID: <48d928bed22f20fc495e9ca1758dc7ed.squirrel@webmail-b.css.fujitsu.com> (raw)
In-Reply-To: <20090831121008.GL4770@balbir.in.ibm.com>

Balbir Singh wrote:
>> > Does this effect deleting of a group and delay it by a large amount?
>> >
>> plz see what cgroup_release_and_xxxx  fixed. This is not for delay
>> but for race-condition, which makes rmdir sleep permanently.
>>
>
> I've seen those patches, where rmdir() can hang. My conern was time
> elapsed since we do css_get() and do a cgroup_release_and_wake_rmdir()
>
plz read unmap() and truncate() code.
The number of pages handled without cond_resched() is limited.

Thanks,
-Kame



WARNING: multiple messages have this Message-ID (diff)
From: "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>
To: balbir@linux.vnet.ibm.com
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>,
	"nishimura@mxp.nes.nec.co.jp" <nishimura@mxp.nes.nec.co.jp>
Subject: Re: [RFC][PATCH 2/5] memcg: uncharge in batched manner
Date: Mon, 31 Aug 2009 21:14:10 +0900 (JST)	[thread overview]
Message-ID: <48d928bed22f20fc495e9ca1758dc7ed.squirrel@webmail-b.css.fujitsu.com> (raw)
In-Reply-To: <20090831121008.GL4770@balbir.in.ibm.com>

Balbir Singh wrote:
>> > Does this effect deleting of a group and delay it by a large amount?
>> >
>> plz see what cgroup_release_and_xxxx  fixed. This is not for delay
>> but for race-condition, which makes rmdir sleep permanently.
>>
>
> I've seen those patches, where rmdir() can hang. My conern was time
> elapsed since we do css_get() and do a cgroup_release_and_wake_rmdir()
>
plz read unmap() and truncate() code.
The number of pages handled without cond_resched() is limited.

Thanks,
-Kame


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  reply	other threads:[~2009-08-31 12:14 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-28  4:20 [RFC][PATCH 0/5] memcg: reduce lock conetion KAMEZAWA Hiroyuki
2009-08-28  4:20 ` KAMEZAWA Hiroyuki
2009-08-28  4:23 ` [RFC][PATCH 1/5] memcg: change for softlimit KAMEZAWA Hiroyuki
2009-08-28  4:23   ` KAMEZAWA Hiroyuki
2009-08-28  7:20   ` Balbir Singh
2009-08-28  7:20     ` Balbir Singh
2009-08-28  7:35     ` KAMEZAWA Hiroyuki
2009-08-28  7:35       ` KAMEZAWA Hiroyuki
2009-08-28 13:26       ` Balbir Singh
2009-08-28 13:26         ` Balbir Singh
2009-08-28 14:29         ` KAMEZAWA Hiroyuki
2009-08-28 14:29           ` KAMEZAWA Hiroyuki
2009-08-28 14:40           ` KAMEZAWA Hiroyuki
2009-08-28 14:40             ` KAMEZAWA Hiroyuki
2009-08-28 14:46             ` Balbir Singh
2009-08-28 15:06               ` KAMEZAWA Hiroyuki
2009-08-28 15:06                 ` KAMEZAWA Hiroyuki
2009-08-28 15:08                 ` Balbir Singh
2009-08-28 15:08                   ` Balbir Singh
2009-08-28 15:12                   ` KAMEZAWA Hiroyuki
2009-08-28 15:12                     ` KAMEZAWA Hiroyuki
2009-08-28 15:15                     ` Balbir Singh
2009-08-28 15:15                       ` Balbir Singh
2009-08-28 14:45           ` Balbir Singh
2009-08-28 14:45             ` Balbir Singh
2009-08-28 14:58             ` KAMEZAWA Hiroyuki
2009-08-28 14:58               ` KAMEZAWA Hiroyuki
2009-08-28 15:07               ` Balbir Singh
2009-08-28 15:07                 ` Balbir Singh
2009-08-28  4:24 ` [RFC][PATCH 2/5] memcg: uncharge in batched manner KAMEZAWA Hiroyuki
2009-08-28  4:24   ` KAMEZAWA Hiroyuki
2009-08-28  4:53   ` KAMEZAWA Hiroyuki
2009-08-28  4:53     ` KAMEZAWA Hiroyuki
2009-08-28  4:55     ` KAMEZAWA Hiroyuki
2009-08-28  4:55       ` KAMEZAWA Hiroyuki
2009-08-28 15:10   ` Balbir Singh
2009-08-28 15:10     ` Balbir Singh
2009-08-28 15:21     ` KAMEZAWA Hiroyuki
2009-08-28 15:21       ` KAMEZAWA Hiroyuki
2009-08-28 16:03       ` Balbir Singh
2009-08-28 16:03         ` Balbir Singh
2009-08-31 11:02   ` Balbir Singh
2009-08-31 11:02     ` Balbir Singh
2009-08-31 11:59     ` KAMEZAWA Hiroyuki
2009-08-31 11:59       ` KAMEZAWA Hiroyuki
2009-08-31 12:10       ` Balbir Singh
2009-08-31 12:14         ` KAMEZAWA Hiroyuki [this message]
2009-08-31 12:14           ` KAMEZAWA Hiroyuki
2009-08-31 12:23           ` Balbir Singh
2009-08-31 14:36             ` KAMEZAWA Hiroyuki
2009-08-31 14:36               ` KAMEZAWA Hiroyuki
2009-08-28  4:25 ` [RFC][PATCH 3/5] memcg: unmap, truncate, invalidate uncharege in batch KAMEZAWA Hiroyuki
2009-08-28  4:25   ` KAMEZAWA Hiroyuki
2009-08-31 11:02   ` Balbir Singh
2009-08-31 11:02     ` Balbir Singh
2009-08-28  4:27 ` [RFC][PATCH 4/5] memcg: per-cpu charge stock KAMEZAWA Hiroyuki
2009-08-28  4:27   ` KAMEZAWA Hiroyuki
2009-08-31 11:10   ` Balbir Singh
2009-08-31 11:10     ` Balbir Singh
2009-08-31 12:07     ` KAMEZAWA Hiroyuki
2009-08-31 12:07       ` KAMEZAWA Hiroyuki
2009-08-28  4:28 ` [RFC][PATCH 5/5] memcg: drain per cpu stock KAMEZAWA Hiroyuki
2009-08-28  4:28   ` KAMEZAWA Hiroyuki
2009-08-31 11:11   ` Balbir Singh
2009-08-31 11:11     ` Balbir Singh
2009-08-31 12:09     ` KAMEZAWA Hiroyuki
2009-08-31 12:09       ` KAMEZAWA Hiroyuki
2009-08-28  4:28 ` [RFC][PATCH 0/5] memcg: reduce lock conetion Balbir Singh
2009-08-28  4:28   ` Balbir Singh
2009-08-28  4:33   ` KAMEZAWA Hiroyuki
2009-08-28  4:33     ` KAMEZAWA Hiroyuki

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