linux-kernel - Re: [PATCH 3/9] Use _META bio I/O types for metadata I/O

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Date:	Fri, 23 Nov 2007 17:37:23 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	David Chinner <dgc@....com>
Cc:	xfs-oss <xfs@....sgi.com>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/9] Use _META bio I/O types for metadata I/O

On Thu, Nov 22, 2007 at 11:35:12AM +1100, David Chinner wrote:
> Improve metadata I/O merging in the elevator
> 
> Change all async metadata buffers to use [READ|WRITE]_META I/O types
> so that the I/O doesn't get issued immediately. This allows merging
> of adjacent metadata requests but still prioritises them over bulk
> data. This shows a 10-15% improvement in sequential create speed of
> small files.
> 
> Don't include the log buffers in this classification - leave them
> as sync types so they are issued immediately.

Looks good, and just including the trivial fs.h addition here might be
okay aswell.

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