From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q2T8qoao054300 for ; Thu, 29 Mar 2012 03:52:50 -0500 Received: from ipmail04.adl6.internode.on.net (ipmail04.adl6.internode.on.net [150.101.137.141]) by cuda.sgi.com with ESMTP id j5SWeorVmyqYH0gI for ; Thu, 29 Mar 2012 01:52:49 -0700 (PDT) Date: Thu, 29 Mar 2012 19:52:26 +1100 From: Dave Chinner Subject: Re: [PATCH] xfs: Do background CIL flushes via a workqueue Message-ID: <20120329085226.GR5091@dastard> References: <1332841605-3538-1-git-send-email-david@fromorbit.com> <20120327143127.GA11434@infradead.org> <20120327155759.GB28707@redhat.com> <20120327160300.GA22555@infradead.org> <20120327161941.GC28707@redhat.com> <20120327170309.GA6712@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20120327170309.GA6712@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: Vivek Goyal , xfs@oss.sgi.com On Tue, Mar 27, 2012 at 01:03:09PM -0400, Christoph Hellwig wrote: > On Tue, Mar 27, 2012 at 12:19:41PM -0400, Vivek Goyal wrote: > > So xfs either need to resort to similar optimizaiton where IO type from > > both the process context is of same type or try to do all the IO from > > one process context. > > All XFS log I/O is marked SYNC and (FUA and/or FLUSH). Not if the filesystem is mounted nobarrier, as is recommended for filesystems on hardware RAID with BBWCs.... Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs