From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: Re: PATCH: Further aacraid work Date: Thu, 17 Jun 2004 16:38:42 -0400 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20040617203842.GC8705@devserv.devel.redhat.com> References: <547AF3BD0F3F0B4CBDC379BAC7E4189FD2407B@otce2k03.adaptec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx1.redhat.com ([66.187.233.31]:29130 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S262438AbUFQUlI (ORCPT ); Thu, 17 Jun 2004 16:41:08 -0400 Content-Disposition: inline In-Reply-To: <547AF3BD0F3F0B4CBDC379BAC7E4189FD2407B@otce2k03.adaptec.com> List-Id: linux-scsi@vger.kernel.org To: "Salyzyn, Mark" , y@redhat.com Cc: Alan Cox , Clay Haapala , James Bottomley , Christoph Hellwig , Linux Kernel , SCSI Mailing List On Thu, Jun 17, 2004 at 01:54:38PM -0400, Salyzyn, Mark wrote: > And I might add, undoing the entropy to result in the descending page > list (but that is the forth time I've said this). > > I ran heavy sequential load overnight and continued to have this > characteristic when taking snapshots of command SG lists. The average SG > element size statistically was 4168 bytes. What do the stats look like with the patch Andrew Morton (I think) posted to reverse the page order from the allocator ?