From: Theodore Ts'o Subject: Re: Test generic/299 stalling forever Date: Wed, 12 Oct 2016 22:15:52 -0400 Message-ID: <20161013021552.l6afs2k5tjcsfp2k@thunk.org> References: <20150618155337.GA10439@thunk.org> <20150618233430.GK20262@dastard> <20160929043722.ypf3tnxsl6ovt653@thunk.org> <20161012211407.GL23194@dastard> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Dave Chinner , linux-ext4@vger.kernel.org, fstests@vger.kernel.org, tarasov@vasily.name To: Jens Axboe Return-path: Received: from imap.thunk.org ([74.207.234.97]:56156 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933475AbcJMCQc (ORCPT ); Wed, 12 Oct 2016 22:16:32 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Wed, Oct 12, 2016 at 03:19:25PM -0600, Jens Axboe wrote: > > FWIW, this is the commit that fixes it: > > commit 39d13e67ef1f4b327c68431f8daf033a03920117 > Author: Jens Axboe > Date: Fri Aug 26 14:39:30 2016 -0600 > > backend: check if we need to update rusage stats, if stat_mutex is busy > > 2.14 and newer should not have the problem, but earlier versions may > depending on how old... Unfortunately, I'm still seeing hangs in generic/299 with the latest version of fio: fio fio-2.14-10-g0a301e9 (Fri, 23 Sep 2016 11:57:00 -0600) If I use an older fio, it reliably does not hang. What can I do to help debug this? As I said, I can attach to the hanging fio using a gdb and give you stackdumps for all of the threads if that would be helpful. - Ted