From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p8DFQ9I5067609 for ; Tue, 13 Sep 2011 10:26:10 -0500 Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 054651ED996D for ; Tue, 13 Sep 2011 08:26:08 -0700 (PDT) Received: from bombadil.infradead.org (173-166-109-252-newengland.hfc.comcastbusiness.net [173.166.109.252]) by cuda.sgi.com with ESMTP id khrqzjA3wiaoOIXm for ; Tue, 13 Sep 2011 08:26:08 -0700 (PDT) Date: Tue, 13 Sep 2011 11:26:08 -0400 From: Christoph Hellwig Subject: Re: XFS: Observed Crash followed by deadlock of khubd/sync/XFS Message-ID: <20110913152607.GA21460@infradead.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Amit Sahrawat Cc: xfs@oss.sgi.com On Thu, Sep 08, 2011 at 10:58:35PM +0530, Amit Sahrawat wrote: > Since this is very hard to reproduce, to make it easy to debug. This > can be reproduce by introducing msleep in the kernel xfs_umountfs() > before xfs_log_sbcount(), just add a print before this function and > sleep and the moment the print appear unplug the USB device, same > scenario will be reproduced. > CRASH will show the backtrace and return to normal shell, but when > process state is checked, khubd will be shown in TASK-UNINTERRUPTIBLE > state 'D'. > Further if sync is issued that will also get converted to 'D' state, > the back-trace for each of the task is same as mentioned in the > previous mail. I've not been able to reproduce this using that method so far. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs