linux-kernel - Re: [PATCH v2] fix get_scan_count for working well with small targets

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Message-Id: <20110427120931.a993890f.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 27 Apr 2011 12:09:31 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"minchan.kim@...il.com" <minchan.kim@...il.com>,
	"mgorman@...e.de" <mgorman@...e.de>, Ying Han <yinghan@...gle.com>
Subject: Re: [PATCH v2] fix get_scan_count for working well with small
 targets

On Wed, 27 Apr 2011 10:50:31 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> On Tue, 26 Apr 2011 13:59:34 -0700
> Andrew Morton <akpm@...ux-foundation.org> wrote:
> 
> > What about simply removing the nr_saved_scan logic and permitting small
> > scans?  That simplifies the code and I bet it makes no measurable
> > performance difference.
> > 
> 
> ok, v2 here. How this looks ?
> For memcg, I think I should add select_victim_node() for direct reclaim,
> then, we'll be tune big memcg using small memory on a zone case.
> 


Ah, sorry this v2 doesn't remove nr_saved_scan in reclaim_stat. ...
I will send v3.

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