From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: bytes/CDB of SCSI pass thru grossly limited maybe Date: Sat, 28 Aug 2004 17:36:01 +0200 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20040828153601.GA28326@suse.de> References: <20040828143124.GB2518@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from ns.virtualhost.dk ([195.184.98.160]:8873 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S267195AbUH1PgN (ORCPT ); Sat, 28 Aug 2004 11:36:13 -0400 Content-Disposition: inline In-Reply-To: List-Id: linux-scsi@vger.kernel.org To: Alan Stern Cc: Pat LaVarre , SCSI development list On Sat, Aug 28 2004, Alan Stern wrote: > > That said, it still wants splitting into two before you should go > > higher. > > I don't understand. What needs to be split into two? And why? See earlier discussion on this field - it needs to be split into a 'max hardware/driver supported value' and a 'optimal real life value' where the latter could be controlled dynamically by looking at response and completion times of requests. Right now ->max_sectors is a grey area, sometimes it's a hardware/driver limit, often it is not. But we have to treat it as such for now. Jens