From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shaohua Li Subject: Re: Problem with DISCARD and RAID10 Date: Tue, 6 Nov 2012 19:40:17 +0800 Message-ID: <20121106114017.GB19182@kernel.org> References: <5098D92A.3000503@fnarfbargle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <5098D92A.3000503@fnarfbargle.com> Sender: linux-raid-owner@vger.kernel.org To: Brad Campbell Cc: linux RAID , martin.petersen@oracle.com List-Id: linux-raid.ids On Tue, Nov 06, 2012 at 05:32:26PM +0800, Brad Campbell wrote: > G'day Shaohua, > > I'm testing Vanilla 3.7.0-rc4 and bumping up against squillions of these : > > [ 41.094726] request botched: dev sdc: type=1, flags=122d8081 > [ 41.094774] sector 28317178, nr/cnr 0/32 > [ 41.094815] bio ffff8807fe885300, biotail ffff8807fe887300, > buffer (null), len 0 > [ 41.100045] request botched: dev sda: type=1, flags=122d8081 > [ 41.100094] sector 28317403, nr/cnr 0/32 > [ 41.100134] bio ffff8807fe885840, biotail ffff8807fe887840, > buffer (null), len 0 > [ 41.100718] request botched: dev sdb: type=1, flags=122d8081 > [ 41.100767] sector 28317179, nr/cnr 0/224 > [ 41.100808] bio ffff8807fe885a80, biotail ffff8807fe887d80, > buffer (null), len 0 > [ 41.104649] request botched: dev sdc: type=1, flags=122d8081 > [ 41.104697] sector 28317179, nr/cnr 0/224 > [ 41.104738] bio ffff8807fe886000, biotail ffff8807fe887300, > buffer (null), len 0 cc Martin to check if he has idea. Hmm, I thought such problem is already fixed by Martin's discard merge patches and my last test in SATA SSD doesn't show this problem. Maybe there is still a corner case we didn't handle discard request merge well. Time run out today, I'll check tomorrow. Thanks, Shaohua