From: Jan Kara Subject: Re: generic/232 test failures on 4.14-rc1 Date: Mon, 25 Sep 2017 15:59:46 +0200 Message-ID: <20170925135946.GB8004@quack2.suse.cz> References: <20170921154846.re5vcyn3bugdbie5@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org, jack@suse.cz To: Eric Whitney Return-path: Received: from mx2.suse.de ([195.135.220.15]:52098 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934254AbdIYN7s (ORCPT ); Mon, 25 Sep 2017 09:59:48 -0400 Content-Disposition: inline In-Reply-To: <20170921154846.re5vcyn3bugdbie5@localhost.localdomain> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu 21-09-17 11:48:46, Eric Whitney wrote: > I'm seeing generic/232 fail from time to time when running a 4.14-rc1 kernel > on xfstest-bld's most recent kvm-xfstests test appliance. In one set of > trials, it failed in the same manner 4 out of 10 times when running the 4k test > configuration for ext4. > > The failure bisects to "quota: Do not acquire dqio_sem for dquot overwrites in > v2 format" (ab2b86360f6e). When this patch was reverted in a 4.14-rc1 kernel, > the failure did not reoccur in a series of 20 trials. Thanks for debugging this! I'd just note that the commit hash of that change is different for me - d2faa415166b2883428efa92f451774ef44373ac. > Example output from the failed test: > > QA output created by 232 > > Testing fsstress > > seed = S > Comparing user usage > 218a219 > > #3740 -- 4 0 0 1 0 0 > 245a247 > > #45 -- 0 0 0 1 0 0 > > Note: I'm also seeing a similar failure for generic/233, but the patch > containing the root cause likely comes somewhere after ab2b86360f6e. I'll post > another bug report once I locate it. I'll try to debug this further. Thanks for report! Honza -- Jan Kara SUSE Labs, CR