From: Andrew Morton Subject: Re: Updated ext4/jbd2 patches based on 2.6.19-rc1 Date: Thu, 5 Oct 2006 23:50:17 -0700 Message-ID: <20061005235017.cbc4fdab.akpm@osdl.org> References: <1160072610.8508.12.camel@kleikamp.austin.ibm.com> <20061005205526.7fe744f5.akpm@osdl.org> <20061005215442.310b7792.rdunlap@xenotime.net> <20061006055305.GG22010@schatzie.adilger.int> <20061005230401.0159e31b.akpm@osdl.org> <20061006064103.GJ22010@schatzie.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Randy Dunlap , Dave Kleikamp , ext4 development Return-path: Received: from smtp.osdl.org ([65.172.181.4]:9403 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932645AbWJFGuX (ORCPT ); Fri, 6 Oct 2006 02:50:23 -0400 To: Andreas Dilger In-Reply-To: <20061006064103.GJ22010@schatzie.adilger.int> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Fri, 6 Oct 2006 00:41:03 -0600 Andreas Dilger 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.