From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id 9FEE16B0034 for ; Thu, 13 Oct 2011 04:20:12 -0400 (EDT) From: Hans Schillstrom Subject: Re: possible slab deadlock while doing ifenslave Date: Thu, 13 Oct 2011 10:19:58 +0200 References: <201110121019.53100.hans@schillstrom.com> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201110131019.58397.hans@schillstrom.com> Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: linux-mm@kvack.org On Wednesday, October 12, 2011 22:35:51 David Rientjes wrote: > On Wed, 12 Oct 2011, Hans Schillstrom wrote: > > > Hello, > > I got this when I was testing a VLAN patch i.e. using Dave Millers net-next from today. > > When doing this on a single core i686 I got the warning every time, > > however ifenslave is not hanging it's just a warning > > Have not been testing this on a multicore jet. > > > > There is no warnings with a 3.0.4 kernel. > > > > Is this a known warning ? > > > > ~ # ifenslave bond0 eth1 eth2 > > > > ============================================= > > [ INFO: possible recursive locking detected ] > > 3.1.0-rc9+ #3 > > --------------------------------------------- > > ifenslave/749 is trying to acquire lock: > > (&(&parent->list_lock)->rlock){-.-...}, at: [] cache_flusharray+0x41/0xdb > > > > but task is already holding lock: > > (&(&parent->list_lock)->rlock){-.-...}, at: [] cache_flusharray+0x41/0xdb > > > > Hmm, the only candidate that I can see that may have caused this is > 83835b3d9aec ("slab, lockdep: Annotate slab -> rcu -> debug_object -> > slab"). Could you try reverting that patch in your local tree and seeing > if it helps? > That was not our candidate ... i.e. same results Thanks Hans -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org