From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ric Wheeler Subject: Re: [RFT] major libata update Date: Tue, 16 May 2006 17:41:53 -0400 Message-ID: <446A4721.3030506@emc.com> References: <20060515170006.GA29555@havoc.gtf.org> <4469B93E.6010201@emc.com> <4469E0DB.1040709@garzik.org> <4469EEC0.4060907@gmail.com> <446A1A21.80501@emc.com> Reply-To: ric@emc.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mexforward.lss.emc.com ([168.159.213.200]:58986 "EHLO mexforward.lss.emc.com") by vger.kernel.org with ESMTP id S932187AbWEPVmV (ORCPT ); Tue, 16 May 2006 17:42:21 -0400 In-Reply-To: <446A1A21.80501@emc.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: ric@emc.com Cc: Tejun Heo , Jeff Garzik , linux-ide@vger.kernel.org, Mark Lord , Jens Axboe One other note, it seems like this patch set has broken the write barrier support - is that a side effect of enabling NCQ still? I see messages that claim flush barriers are enabled: [root@c001n01 root]# mount -o barrier=flush,rw,noatime,nodiratime,data=ordered,notail /dev/sda10 /mnt/1 May 16 22:21:56 centera kernel: ReiserFS: sda10: found reiserfs format "3.6" with standard journal [root@c001n01 root]# May 16 22:21:58 centera kernel: ReiserFS: sda10: using ordered data mode May 16 22:21:58 centera kernel: reiserfs: using flush barriers May 16 22:21:58 centera kernel: ReiserFS: sda10: journal params: device sda10, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 May 16 22:21:58 centera kernel: ReiserFS: sda10: checking transaction log (sda10) May 16 22:21:58 centera kernel: ReiserFS: sda10: Using r5 hash to sort names But when I test with my synchronous write load, I am going at 6 times the normal rate (i.e., the rate I see with barriers disabled) ;-) ric