Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964812AbXBBEJP (ORCPT ); Thu, 1 Feb 2007 23:09:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964845AbXBBEJP (ORCPT ); Thu, 1 Feb 2007 23:09:15 -0500 Received: from omx2-ext.sgi.com ([192.48.171.19]:43948 "EHLO omx2.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S964812AbXBBEJO (ORCPT ); Thu, 1 Feb 2007 23:09:14 -0500 Date: Fri, 2 Feb 2007 15:08:58 +1100 From: David Chinner To: Jens Axboe Cc: Christoph Lameter , Andrew Morton , David Chinner , linux-kernel@vger.kernel.org Subject: Re: 2.6.20-rc6-mm3 Message-ID: <20070202040858.GN33919298@melbourne.sgi.com> References: <20070129204528.eb8d695e.akpm@osdl.org> <20070131162422.6bccc52c.akpm@osdl.org> <20070131163638.290f40c1.akpm@osdl.org> <20070201062018.GC33919298@melbourne.sgi.com> <20070131231253.fdebc9f5.akpm@osdl.org> <20070201191857.GQ10305@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070201191857.GQ10305@kernel.dk> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 971 Lines: 29 On Thu, Feb 01, 2007 at 08:18:57PM +0100, Jens Axboe wrote: > That down() probably wants a replug to precede it. Probably something > like: > > if (atomic_read(&bp->b_io_remaining)) > blk_replug_current_nested(); > > for xfs_buf_wait_unpin() and xfs_buf_lock(). Does this fix it? Jens, this patch looks like you originally removed the explicit unplug calls that XFS used to prevent metadata I/O hangs and now you are putting them back. Correct? Reading on from Andrew's earlier comments, shouldn't XFS have worked unchanged? I'm just trying to understand why you removed the explicit unplugs in the first place..... Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/