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 (8.12.11.20060308/8.12.11/SuSE Linux 0.7) with ESMTP id mBU4NZNY003754 for ; Mon, 29 Dec 2008 22:23:35 -0600 Received: from mx2.suse.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5B0DA1795387 for ; Mon, 29 Dec 2008 20:23:34 -0800 (PST) Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by cuda.sgi.com with ESMTP id KqDLla7ihVVOLT3o for ; Mon, 29 Dec 2008 20:23:34 -0800 (PST) Date: Tue, 30 Dec 2008 05:23:33 +0100 From: Nick Piggin Subject: Re: BUG: soft lockup - is this XFS problem? Message-ID: <20081230042333.GC27679@wotan.suse.de> References: <20081223171259.GA11945@infradead.org> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <20081223171259.GA11945@infradead.org> 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: Christoph Hellwig Cc: linux-kernel@vger.kernel.org, Roman Kononov , xfs@oss.sgi.com On Tue, Dec 23, 2008 at 12:12:59PM -0500, Christoph Hellwig wrote: > > Nick, I've seen various reports like this by Roman. It seems to be > caused by an interaction of the lockless pagecache with the xfs > I/O code. Any idea what might be wrong here: Hmm, it could get into a loop here if there is a page in the pagecache with a zero refcount, which might be a problem with XFS... other looping conditions might indicate a problem iwth lockless pagecache or radix tree. It would be very helpful to know what condition it is looping on... _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs