linux-kernel - Re: [RFC][PATCH] memcg soft limit (yet another new design) v1

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Message-ID: <cb947346323dc0c602b6aad8eec13263.squirrel@webmail-b.css.fujitsu.com>
Date:	Sun, 29 Mar 2009 01:10:37 +0900 (JST)
From:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>
Subject: Re: [RFC][PATCH] memcg soft limit (yet another new design) v1

Balbir Singh wrote:
> * KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2009-03-27
> 13:59:33]:

>>   When vm.swappiness = 60  => 60MB of memory are swapped out from B.
>>   When vm.swappiness = 10  => 1MB of memory are swapped out from B
>>
>>   If no soft limit, 350MB of swap out will happen from B.(swapiness=60)
>>
>
> How did you calculate the swap usage of group B?
>
 memsory.memsw.usage_in_bytes - memory.usage_in_bytes.

>> I'll try much more complexed ones in the weekend.
>
> You might want to try experiments where the group with the higher soft
> limit starts much later than the group with lower soft limit and both
> have a high demand for memory. Also try corner cases such as soft
> limits being 0, or groups where soft limits are equal, etc.
>
thx, good input. maybe I need some hook in "set soft limit" path.

> We have a long weekend, so I've been unable to test/review your
> patches. I'll do so soon if possible.
>
thank you.
-Kame

> --
> 	Balbir
>


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