From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ipmail07.adl2.internode.on.net ([150.101.137.131]:28027 "EHLO ipmail07.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932593AbdJKINc (ORCPT ); Wed, 11 Oct 2017 04:13:32 -0400 Received: from dave by dastard with local (Exim 4.80) (envelope-from ) id 1e2C8w-0005yA-4r for fstests@vger.kernel.org; Wed, 11 Oct 2017 19:13:30 +1100 Date: Wed, 11 Oct 2017 19:13:30 +1100 From: Dave Chinner Subject: Re: [whacky issue] xfs/277 endlessly looping in _require_xfs_io_command Message-ID: <20171011081330.GF15067@dastard> References: <20171011080047.GE15067@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171011080047.GE15067@dastard> Sender: fstests-owner@vger.kernel.org To: fstests@vger.kernel.org List-ID: On Wed, Oct 11, 2017 at 07:00:47PM +1100, Dave Chinner wrote: > HI folks, > > I was wondering if anyone else had seen this problem, because it's > got me absolutely stumped. One of my test VMs is having a really > weird livelock in xfs/277. It's getting stuck in an endless loop > burning the entire CPU in a the 277 process (i.e. running bash). > What it is stuck on makes no sense to me, nor does the looping > behaviour, and I can only reproduce it on this one machine. FWIW, the trigger for this was enabling rmap+reflink on the test device on this machine for the first time. Hence this is the first time the test has been run on that machine... Cheers, Dave. -- Dave Chinner david@fromorbit.com