From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [ANNOUNCE] QLogic qla2xxx driver update available (v8.00.00b6). Date: Thu, 6 Nov 2003 18:58:13 +0100 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20031106175813.GQ437@suse.de> References: <20031106171409.GN437@suse.de> <1068140592.5234.8.camel@laptop.fenrus.com> <20031106175032.GO437@suse.de> <20031106185511.C15403@devserv.devel.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from ns.suse.de ([195.135.220.2]:27583 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S263785AbTKFR7B (ORCPT ); Thu, 6 Nov 2003 12:59:01 -0500 Content-Disposition: inline In-Reply-To: <20031106185511.C15403@devserv.devel.redhat.com> List-Id: linux-scsi@vger.kernel.org To: Arjan van de Ven Cc: Andrew Vasquez , Mike Anderson , Linux-Kernel , Linux-SCSI On Thu, Nov 06 2003, Arjan van de Ven wrote: > > On Thu, Nov 06, 2003 at 06:50:32PM +0100, Jens Axboe wrote: > > drive it is not). Now both 2.4 and 2.6 make that guarentee. The only > > argument for disabling clustering would be for 2.4 for CPU cycle > > reasons. > > yep; on 2.4 it's rather visible in the profiles during some benchmark > test I did (like 5% of total CPU cycles) yeah so I gather, although 5% seems extremely excessive (512-byte raw io, on tons of disks?). -- Jens Axboe