linux-kernel - Re: [PATCH 4/5] writeback: remove pages_skipped accounting in __block_write_full

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Date:	Wed, 3 Oct 2007 12:22:05 +1000
From:	David Chinner <dgc@....com>
To:	Fengguang Wu <wfg@...l.ustc.edu.cn>
Cc:	David Chinner <dgc@....com>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org, Ken Chen <kenchen@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michael Rubin <mrubin@...gle.com>
Subject: Re: [PATCH 4/5] writeback: remove pages_skipped accounting in __block_write_full_page()

On Wed, Oct 03, 2007 at 09:43:33AM +0800, Fengguang Wu wrote:
> On Wed, Oct 03, 2007 at 07:55:18AM +1000, David Chinner wrote:
> > > 
> > > do not quite agree with each other. The page writeback should be skipped for
> > > 'locked buffer', but here it is 'clean buffer'!
> > 
> > Ok, so that means we need an equivalent fix in xfs_start_page_writeback()
> > as it will skip pages with clean buffers just like this. Something like
> > this (untested)?
> 
> Sure OK - as long as it is 'no write because of clean buffer'.

Yes, that's the case here.

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group
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