From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754580Ab1HTRlm (ORCPT ); Sat, 20 Aug 2011 13:41:42 -0400 Received: from 173-166-109-252-newengland.hfc.comcastbusiness.net ([173.166.109.252]:50517 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751382Ab1HTRlk (ORCPT ); Sat, 20 Aug 2011 13:41:40 -0400 Date: Sat, 20 Aug 2011 13:41:37 -0400 From: Christoph Hellwig To: Jens Axboe Cc: Linus Torvalds , "linux-kernel@vger.kernel.org" Subject: Re: [GIT PULL] block bits for 3.1-rc Message-ID: <20110820174137.GA27243@infradead.org> References: <4E4E6238.3080808@fusionio.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4E4E6238.3080808@fusionio.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 19, 2011 at 03:16:40PM +0200, Jens Axboe wrote: > - Revert of the CFQ meta data special treatment patch, it's been shown > to regress a kernel build workload by about 10%. More investigation > is needed, for 3.1 lets just back it out. Sorry, but you can't simply do that without any coordination. We have added that marker to xfs now that the stupid special casing stopped, and turning it back on will cause us massive slowdows. Next time please better coordinate this with its users. In fact I have never seen this patch or a discussion on any mailinglist.