From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dan Williams" Subject: Re: [PATCH 001 of 6] md: Fix an occasional deadlock in raid5 Date: Wed, 16 Jan 2008 00:09:31 -0700 Message-ID: References: <20080114123726.19968.patches@notabene> <1080114014525.20337@suse.de> <20080115215425.b1fcba31.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: dean gaudet Cc: Andrew Morton , NeilBrown , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-raid.ids > heheh. > > it's really easy to reproduce the hang without the patch -- i could > hang the box in under 20 min on 2.6.22+ w/XFS and raid5 on 7x750GB. > i'll try with ext3... Dan's experiences suggest it won't happen with ext3 > (or is even more rare), which would explain why this has is overall a > rare problem. > Hmmm... how rare? http://marc.info/?l=linux-kernel&m=119461747005776&w=2 There is nothing specific that prevents other filesystems from hitting it, perhaps XFS is just better at submitting large i/o's. -stable should get some kind of treatment. I'll take altered performance over a hung system. -- Dan