linux-ext4 - Re: [PATCH] ext4: Group meta-data blocks together.

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Message-ID: <20080515160626.GB23507@skywalker>
Date:	Thu, 15 May 2008 21:36:26 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	cmm@...ibm.com, tytso@....edu, sandeen@...hat.com, adilger@....com
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Group meta-data blocks together.

On Thu, May 15, 2008 at 09:23:59PM +0530, Aneesh Kumar K.V wrote:
> This adds a per inode meta-block prealloc space from which
> meta-data block requests are served. This help in making
> sure meta-data block are closer. This is needed to speedup
> unlink of the file. Any new prealloc space is allocated near
> the goal block specified. The goal block is the last block
> allocated for the file. So we don't keep the data-block and
> meta-data block far apart.
> 

The result can be found at

http://www.radian.org/~kvaneesh/ext4/meta-group/

This patch need to be further improved by grouping the meta-data
at FLEX_BG or block group level rather than per inode. I am sending
it so that others can take a look at the changes

-aneesh

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