From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o3Q2hSUP051360 for ; Sun, 25 Apr 2010 21:43:28 -0500 Received: from thunker.thunk.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 306D22EE10B for ; Sun, 25 Apr 2010 19:45:30 -0700 (PDT) Received: from thunker.thunk.org (thunk.org [69.25.196.29]) by cuda.sgi.com with ESMTP id 6EDxUItbM9VBE7Bt for ; Sun, 25 Apr 2010 19:45:30 -0700 (PDT) Date: Sun, 25 Apr 2010 22:45:27 -0400 From: tytso@mit.edu Subject: Re: [PATCH 3/4] writeback: pay attention to wbc->nr_to_write in write_cache_pages Message-ID: <20100426024527.GD13043@thunk.org> References: <1271731314-5893-1-git-send-email-david@fromorbit.com> <1271731314-5893-4-git-send-email-david@fromorbit.com> <20100425033315.GC667@thunk.org> <20100426014908.GD11437@dastard> <20100426024302.GC13043@thunk.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20100426024302.GC13043@thunk.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: Dave Chinner , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, xfs@oss.sgi.com On Sun, Apr 25, 2010 at 10:43:02PM -0400, tytso@MIT.EDU wrote: > Have you tested with multiple files that are subject to writeout at > the same time? After all, if your I/O allocator does a great job of > keeping the files contiguous in chunks larger tham 4MB, then if you > have two or more files that need to be written out, the page allocator > will round robin between the two files in 4MB chunks, and that might > not be considered an ideal I/O pattern. Argh. Sorry for not proof reading better before hitting the send key.... s/tham/than/ s/page allocator/writeback code/ - Ted _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs