Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751460AbaLCOyY (ORCPT ); Wed, 3 Dec 2014 09:54:24 -0500 Received: from mail-qa0-f42.google.com ([209.85.216.42]:39765 "EHLO mail-qa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750769AbaLCOyW (ORCPT ); Wed, 3 Dec 2014 09:54:22 -0500 Date: Wed, 3 Dec 2014 09:54:18 -0500 From: Tejun Heo To: Linus Torvalds Cc: =?iso-8859-1?Q?D=E2niel?= Fraga , "Paul E. McKenney" , Linux Kernel Mailing List Subject: Re: frequent lockups in 3.18rc4 Message-ID: <20141203145418.GA5013@htj.dyndns.org> References: <547df364.236a8c0a.7b2d.ffffac67@mx.google.com> <20141202184202.GM25340@linux.vnet.ibm.com> <547e0947.c332e00a.23bf.ffffa8bd@mx.google.com> <20141202191143.GN25340@linux.vnet.ibm.com> <547e11fa.8778e00a.3439.ffffa88c@mx.google.com> <20141202205636.GQ25340@linux.vnet.ibm.com> <547e36d1.c54ae00a.2571.fffffd13@mx.google.com> <547e81ce.a1628c0a.4985.ffffb12a@mx.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Tue, Dec 02, 2014 at 08:14:52PM -0800, Linus Torvalds wrote: > I added Tejun to the Cc, just because I wanted to give him a heads-up > that I am tentatively starting to blame him in my dark little mind.. Yeap, keeping watch on the thread and working on a patch to dump more workqueue info on sysrq (I don't know which sysrq alphabet to hang it on yet, mostly likely it'd get appeneded to tasks dump). For all three subsystems, for-3.17 pulls contained quite a bit of changes. I've skimmed through the commits but nothing rings the bell - I've never seen this pattern of failures in any of the three subsystems. Maybe a subtle percpu bug or cpuset messing up scheduling somehow? Anyways, let's see how 47dfe4037 does. Thanks. -- tejun -- 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/