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 18:50:32 +0100 Sender: linux-kernel-owner@vger.kernel.org Message-ID: <20031106175032.GO437@suse.de> References: <20031106171409.GN437@suse.de> <1068140592.5234.8.camel@laptop.fenrus.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1068140592.5234.8.camel@laptop.fenrus.com> To: Arjan van de Ven Cc: Andrew Vasquez , Mike Anderson , Linux-Kernel , Linux-SCSI List-Id: linux-scsi@vger.kernel.org On Thu, Nov 06 2003, Arjan van de Ven wrote: > On Thu, 2003-11-06 at 18:14, Jens Axboe wrote: > > > They were there at the same time as Linux supported > 1GB IO at all. So > > that is incorrect, it's been there all along. > > .... ia64 Yeah you are right, on 64-bit platforms that could have happened. I actually thought that CONTIGUOUS_BUFFERS took care of 4GB, but on checking it does not. So clustering should have been disabled then (which in the in-kernel 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. -- Jens Axboe