Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752494Ab2H0OKL (ORCPT ); Mon, 27 Aug 2012 10:10:11 -0400 Received: from mail-wg0-f44.google.com ([74.125.82.44]:41311 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751136Ab2H0OKI (ORCPT ); Mon, 27 Aug 2012 10:10:08 -0400 MIME-Version: 1.0 In-Reply-To: References: Date: Mon, 27 Aug 2012 10:10:06 -0400 Message-ID: Subject: Re: Possible mptsas regression post 3.5.0 From: John Drescher To: LKML Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1622 Lines: 40 On Fri, Aug 24, 2012 at 3:34 PM, John Drescher wrote: > On Thu, Aug 23, 2012 at 1:34 PM, John Drescher wrote: >> Over the last few weeks I have done some reliability testing with >> mdraid6 on a machine with 2 lsi mptsas controllers and 13 SATA I >> drives. My testing involved physically hot removing a drive forcing >> the raid to grab a spare and rebuild. This worked great for the 5 or >> so times I did this on gentoo-sources-3.5.0 and lower. However any >> attempt to do this on gentoo-sources-3.5.1 or even the 3.6-rc2 git >> resulted in a total lockup of the array. I originally thought this was >> a mdadm regression and posted about that last week here: >> >> https://lkml.org/lkml/2012/8/17/503 >> > > I have bisected the kernel a few times now and the problem was > introduced between > 3.5.0.00007-ged29dbd > 3.5.0.00015-g4d9157e > > After the raid rebuilds again I will bisect again and see if I can > narrow it down to the exact patch. > I have bisected it down to the following patch: Bisecting: 0 revisions left to test after this (roughly 0 steps) [10f8d5b86743b33d841a175303e2bf67fd620f42] SCSI: fix hot unplug vs async scan race It appears this patch caused the bad behavior although I have not tested that yet. I am rebuilding the array (takes ~2 hours) from the previous good bisect. -- John M. Drescher -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/