linux-kernel - Re: Online ext4 defragmention

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Message-ID: <20090112141539.GD21793@mit.edu>
Date:	Mon, 12 Jan 2009 09:15:39 -0500
From:	Theodore Tso <tytso@....edu>
To:	Mike Snitzer <snitzer@...il.com>
Cc:	Alex Buell <alex.buell@...ted.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ext4@...r.kernel.org
Subject: Re: Online ext4 defragmention

On Mon, Jan 12, 2009 at 08:39:33AM -0500, Mike Snitzer wrote:
> 
> Hi Ted,
> 
> Could you elaborate on which allocation patches you're referring to in
> the ext4 patch queue (2.6.28-ext4-3?) ?

They haven't been implemented yet.  They've been discussed on the ext4
mailing list, however.  Basically, the Orlov algorithm was disabled
for flex_bg, and I want to optimize how directory blocks are allocated
to hopefully speed up fsck times a tad bit more.  The design has been
roughly worked out; but it's a matter of me finding time to code and
test it...

						- Ted
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