linux-ext4 - Re: Updated ext4/jbd2 patches based on 2.6.19-rc1

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Message-Id: <20061005235017.cbc4fdab.akpm@osdl.org>
Date:	Thu, 5 Oct 2006 23:50:17 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Andreas Dilger <adilger@...sterfs.com>
Cc:	Randy Dunlap <rdunlap@...otime.net>,
	Dave Kleikamp <shaggy@...tin.ibm.com>,
	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: Updated ext4/jbd2 patches based on 2.6.19-rc1

On Fri, 6 Oct 2006 00:41:03 -0600
Andreas Dilger <adilger@...sterfs.com> wrote:

> The big performance win will come with mballoc and delalloc.  CFS has
> been using mballoc for a few years already with Lustre, and IBM + Bull
> did a lot of benchmarking on it.  The reason it isn't in the first set of
> patches is partly a manageability issue, and partly because it doesn't
> directly affect the on-disk format (outside of much better allocation)
> so it isn't critical to get into the first round of changes.  I believe
> Alex is working on a new set of patches right now.

Are you sure that these things will improve allocation much?  Reservations
made a big improvement there.
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