linux-kernel - Re: [PATCH] writeback: remove unnecessary wait in throttle_vm

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Message-ID: <20070928011846.GA5496@mail.ustc.edu.cn>
Date:	Fri, 28 Sep 2007 09:18:46 +0800
From:	Fengguang Wu <wfg@...l.ustc.edu.cn>
To:	Rik van Riel <riel@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	Kumar Gala <galak@...nel.crashing.org>,
	Pete Zaitcev <zaitcev@...hat.com>, Greg KH <greg@...ah.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] writeback: remove unnecessary wait in
	throttle_vm_writeout()

On Thu, Sep 27, 2007 at 11:16:10AM -0400, Rik van Riel wrote:
> On Thu, 27 Sep 2007 09:50:16 +0800
> Fengguang Wu <wfg@...l.ustc.edu.cn> wrote:
> 
> > We don't want to introduce pointless delays in throttle_vm_writeout()
> > when the writeback limits are not yet exceeded, do we?
> 
> Good catch.

Thank you.
 
> > Signed-off-by: Fengguang Wu <wfg@...l.ustc.edu.cn>
> 
> Reviewed-by: Rik van Riel <riel@...hat.com>

It could be a good fix for 2.6.22/23.  But for -mm, I'm not
sure if throttle_vm_writeout() will be eventually removed ;-)

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