From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752481Ab2HNW3S (ORCPT ); Tue, 14 Aug 2012 18:29:18 -0400 Received: from cantor2.suse.de ([195.135.220.15]:41489 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751095Ab2HNW3R (ORCPT ); Tue, 14 Aug 2012 18:29:17 -0400 Date: Wed, 15 Aug 2012 00:29:15 +0200 From: Jan Kara To: Al Viro Cc: Jan Kara , Fengguang Wu , Sasha Levin , "linux-kernel@vger.kernel.org" , Dave Jones , Kamal Mostafa , "Peter M. Petrakis" , Dann Frazier , Massimo Morana , linux-fsdevel@vger.kernel.org Subject: Re: mq: INFO: possible circular locking dependency detected Message-ID: <20120814222915.GP7122@quack.suse.cz> References: <501D0093.2090108@gmail.com> <20120805170856.GC8954@localhost> <20120807050412.GA23960@localhost> <20120807063955.GX23464@ZenIV.linux.org.uk> <20120808071738.GA20090@localhost> <20120808075439.GA20645@localhost> <20120814220927.GN7122@quack.suse.cz> <20120814221331.GK23464@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120814221331.GK23464@ZenIV.linux.org.uk> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 14-08-12 23:13:31, Al Viro wrote: > On Wed, Aug 15, 2012 at 12:09:27AM +0200, Jan Kara wrote: > > OK, this is a theoretical deadlock since mqueue (virtual) filesystem cannot > > really be frozen. But we should convert the mqueue code to deal with new > > lock ordering of i_mutex and mnt_want_write() anyway to make lockdep happy > > if anything... That file somehow escaped my conversion efforts. I'll send a > > fix tomorrow. > > It's fixed in commit 98d11eacde966041ac7357d99d4079db7173dd40 (in vfs.git) OK, I see. Thanks! Honza -- Jan Kara SUSE Labs, CR