From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754008Ab0AUI47 (ORCPT ); Thu, 21 Jan 2010 03:56:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752854Ab0AUI46 (ORCPT ); Thu, 21 Jan 2010 03:56:58 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:48264 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751393Ab0AUI46 (ORCPT ); Thu, 21 Jan 2010 03:56:58 -0500 Date: Thu, 21 Jan 2010 03:56:55 -0500 From: Christoph Hellwig To: Tejun Heo Cc: lkml , Alex Elder , xfs@oss.sgi.com, Carsten Aulbert Subject: Re: Circular locking dependency warning involing xfs on 2.6.27 Message-ID: <20100121085655.GA687@infradead.org> References: <4B57ADB4.70002@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B57ADB4.70002@kernel.org> User-Agent: Mutt/1.5.19 (2009-01-05) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 21, 2010 at 10:28:20AM +0900, Tejun Heo wrote: > Hello, > > This is on a pretty old kernel but Carsten reports that it happens > occassionally in a pretty large setup involving 1500+ machines (please > feel free to fill in). This happens pretty sporadically so reporting > it just in case this is a yet unknown problem. As I understand it, > testing with newer kernel isn't out of question but it being a > production environment, not a very easy thing. I think the one below is gone. We still have a very similar one that can only happen during unmount, and we're trying to sort that one at the VFS level (see the current thread on -fsdevel)