Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 11 Oct 2002 09:43:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 11 Oct 2002 09:43:46 -0400 Received: from magic.adaptec.com ([208.236.45.80]:32216 "EHLO magic.adaptec.com") by vger.kernel.org with ESMTP id ; Fri, 11 Oct 2002 09:43:44 -0400 Message-ID: From: "Jeffery, David" To: "'Dave Hansen'" Cc: linux-scsi@vger.kernel.org, lkml Subject: RE: Degraded I/O performance, since 2.5.41 Date: Fri, 11 Oct 2002 09:49:23 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1062 Lines: 37 > From: Dave Hansen > James Bottomley wrote: > > OK, this patch should fix it. Do your performance numbers > for ips improve > > again with this? > > Yes, they are better, but still about 10% below what I was seeing > before. Thank you for getting this out so quickly. I can do > reasonable work with this. > > Are the ServeRAID people aware of this situation? Do they know that > their performance could be in the toliet if they don't > implement queue > resizing in the driver? > -- > Dave Hansen > haveblue@us.ibm.com > Dave, Thank you for for adding me to the CC list. I didn't realize how the queueing work would affect scsi drivers. I'm using an older 2.5 kernel so I hadn't seen the performance drop. I'll update my kernel and get to work on it next week when I have time. David Jeffery - 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/