From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751440AbWIMK5X (ORCPT ); Wed, 13 Sep 2006 06:57:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751441AbWIMK5X (ORCPT ); Wed, 13 Sep 2006 06:57:23 -0400 Received: from [213.184.169.222] ([213.184.169.222]:20608 "EHLO raad.intranet") by vger.kernel.org with ESMTP id S1751440AbWIMK5X (ORCPT ); Wed, 13 Sep 2006 06:57:23 -0400 From: Al Boldi To: linux-kernel@vger.kernel.org Subject: Re: What's in linux-2.6-block.git Date: Wed, 13 Sep 2006 13:59:04 +0300 User-Agent: KMail/1.5 MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <200609131359.04972.a1426z@gawab.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jens Axboe wrote: > This lists the main features of the 'block' branch, which is bound for > Linus when 2.6.19 opens: > > - Splitting of request->flags into two parts: > - cmd type > - modified flags > Right now it's a bit of a mess, splitting this up invites a cleaner > usage and also enables us to implement generic "messages" passed on > the regular queue for the device. > > - Abstract out the request back merging and put it into the core io > scheduler layer. Cleans up all the io schedulers, and noop gets > merging for "free". > > - Abstract out the rbtree sorting. Gets rid of duplicated code in > as/cfq/deadline. > > - General shrinkage of the request structure. > > - Killing dynamic rq private structures in deadline/as/cfq. This should > speed up the io path somewhat, as we avoid allocating several > structures (struct request + scheduler private request) for each io > request. > > - meta data io logging for blktrace. > > - CFQ improvements. > > - Make the block layer configurable through Kconfig (David Howells). > > - Lots of cleanups. Does it also address the strange "max_sectors_kb<>192 causes a 50%-slowdown" problem? Thanks! -- Al