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

Andrew Morton
2006-10-06T06:50:23Z

On Fri, 6 Oct 2006 00:41:03 -0600
Andreas Dilger <adilger@clusterfs.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.