Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751786Ab3JZLnK (ORCPT ); Sat, 26 Oct 2013 07:43:10 -0400 Received: from mail-ea0-f172.google.com ([209.85.215.172]:33783 "EHLO mail-ea0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751551Ab3JZLnI (ORCPT ); Sat, 26 Oct 2013 07:43:08 -0400 Date: Sat, 26 Oct 2013 13:43:03 +0200 From: Ingo Molnar To: Linus Torvalds Cc: Thomas Gleixner , Knut Petersen , Paul McKenney , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , Greg KH , linux-kernel Subject: Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging request during shutdown Message-ID: <20131026114303.GA24067@gmail.com> References: <525BD08C.2080101@t-online.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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: 1518 Lines: 43 * Linus Torvalds wrote: > On Fri, Oct 25, 2013 at 11:23 AM, Thomas Gleixner wrote: > > > > Enable DEBUG_OBJECTS, DEBUG_OBJECTS_FREE, DEBUG_OBJECTS_TIMERS > > Yes, but nobody has actually been able to trigger it with those. > It's pretty rare, and the debug options are so expensive that they > aren't reasonable to enable generally... > > So we need to try to figure out how to trigger it, or narrow > things down some way.. If it's timing then maybe the 1 seconds delay isn't enough (especially if it's boot related, where we have a couple of delays already) - the patch below triples it. (If the bug goes away due to some other side effect then this patch won't make a difference to reproducability.) Thanks, Ingo diff --git a/lib/kobject.c b/lib/kobject.c index 084f7b1..124188f 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -595,7 +595,7 @@ static void kobject_release(struct kref *kref) pr_info("kobject: '%s' (%p): %s, parent %p (delayed)\n", kobject_name(kobj), kobj, __func__, kobj->parent); INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup); - schedule_delayed_work(&kobj->release, HZ); + schedule_delayed_work(&kobj->release, 3*HZ); #else kobject_cleanup(kobj); #endif -- 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/