linux-kernel - Re: [PATCH -mmotm 3/4] memcg: dirty pages accounting and limiting infrastructure

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Message-Id: <20100309092054.b18a4ff2.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 9 Mar 2010 09:20:54 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
Cc:	Andrea Righi <arighi@...eler.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Greg Thelen <gthelen@...gle.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Andrew Morton <akpm@...ux-foundation.org>,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH -mmotm 3/4] memcg: dirty pages accounting and limiting
 infrastructure

On Tue, 9 Mar 2010 09:18:45 +0900
Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote:

> On Mon, 8 Mar 2010 17:31:00 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> > On Mon, 8 Mar 2010 17:07:11 +0900
> > Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote:

> > Hmm...accepatable ? (sounds it's in error-range)
> > 
> > BTW, why local_irq_disable() ? 
> > local_irq_save()/restore() isn't better ?
> > 
> I don't have any strong reason. All of lock_page_cgroup() is *now* called w/o irq disabled,
> so I used just disable()/enable() instead of save()/restore().

My point is, this will be used under treelock soon.

Thanks,
-Kame

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