Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754769Ab3FFVR6 (ORCPT ); Thu, 6 Jun 2013 17:17:58 -0400 Received: from mail-pa0-f51.google.com ([209.85.220.51]:54523 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751466Ab3FFVR5 (ORCPT ); Thu, 6 Jun 2013 17:17:57 -0400 Date: Thu, 6 Jun 2013 14:17:52 -0700 From: Tejun Heo To: Ben Greear Cc: Eric Dumazet , Rusty Russell , Joe Lawrence , Linux Kernel Mailing List , stable@vger.kernel.org, "Luis R. Rodriguez" , Jouni Malinen , Vasanthakumar Thiagarajan , Senthil Balasubramanian , linux-wireless@vger.kernel.org, ath9k-devel@venema.h4ckr.net, Thomas Gleixner , Ingo Molnar Subject: Re: stop_machine lockup issue in 3.9.y. Message-ID: <20130606211752.GG5045@htj.dyndns.org> References: <51AF8D4B.4090407@candelatech.com> <51AF91F5.6090801@candelatech.com> <51AFA677.9010605@candelatech.com> <20130605211157.GK10693@mtj.dyndns.org> <1370482492.24311.308.camel@edumazet-glaptop> <20130606031444.GA12335@mtj.dyndns.org> <1370489181.24311.318.camel@edumazet-glaptop> <51B004CD.6080007@candelatech.com> <20130606205514.GC5045@htj.dyndns.org> <51B0FBFC.8040809@candelatech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51B0FBFC.8040809@candelatech.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 945 Lines: 24 On Thu, Jun 06, 2013 at 02:15:40PM -0700, Ben Greear wrote: > >First of all, kudos for tracking the issue down. While the removal of > >looping limit in softirq handling was the direct cause for making the > >problem visible, it's very bothering that we have softirq runaway. > >Finding out the perpetrator shouldn't be hard. Something like the > >following should work (untested). Once we know which softirq (prolly > >the network one), we can dig deeper. > > The patch below assumes my fix is not in the code, right? Yeap. > I'll work on this, but it will probably be next week before > I have time...gotta catch up on some other things first. Thanks a lot for hunting this down! -- 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/