Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751803Ab3FWOlC (ORCPT ); Sun, 23 Jun 2013 10:41:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43179 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751478Ab3FWOk7 (ORCPT ); Sun, 23 Jun 2013 10:40:59 -0400 Date: Sun, 23 Jun 2013 16:36:34 +0200 From: Oleg Nesterov To: Dave Jones , "Paul E. McKenney" , Linux Kernel , Linus Torvalds , "Eric W. Biederman" , Andrey Vagin Subject: Re: frequent softlockups with 3.10rc6. Message-ID: <20130623143634.GA2000@redhat.com> References: <20130619164540.GB22483@redhat.com> <20130619175356.GA23673@redhat.com> <20130619181302.GE5146@linux.vnet.ibm.com> <20130620001212.GB12151@redhat.com> <20130620161652.GA4462@linux.vnet.ibm.com> <20130621151119.GA1596@redhat.com> <20130621195949.GA15519@redhat.com> <20130622013731.GA22918@redhat.com> <20130622173129.GA29375@redhat.com> <20130622215905.GA28238@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130622215905.GA28238@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1174 Lines: 32 On 06/22, Dave Jones wrote: > > On Sat, Jun 22, 2013 at 07:31:29PM +0200, Oleg Nesterov wrote: > > > > [ 7485.261299] WARNING: at include/linux/nsproxy.h:63 get_proc_task_net+0x1c8/0x1d0() > > > > Hmm. The test case tries to create the symlink in /proc/*/net/ ? > > hit it with symlink, but also some other syscalls. eg: Yes, this is fine, the warnings without lockup are not interesting. I thought that, perhaps, an exiting task can trigger this WARN() from task_work_run(). And this would be fine too! But this could provide more info if lockup happens after that. So please ignore. > > But it seems you can't ? > > > > Dave, I am sorry but all I can do is to ask you to do more testing. > > Could you please reproduce the lockup again on the clean Linus's > > current ? (and _without_ reverting 8aac6270, of course). > > I'll give it a shot. Just rebuilt clean tree, and restarted the tests. Thanks a lot. Oleg. -- 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/