From owner-freebsd-scsi@FreeBSD.ORG Wed Aug 6 22:03:01 2003 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0159D37B405 for ; Wed, 6 Aug 2003 22:03:01 -0700 (PDT) Received: from smtp.mho.com (smtp.mho.net [64.58.4.6]) by mx1.FreeBSD.org (Postfix) with SMTP id 4513743FA3 for ; Wed, 6 Aug 2003 22:02:59 -0700 (PDT) (envelope-from scottl@freebsd.org) Received: (qmail 47632 invoked by uid 1002); 7 Aug 2003 05:02:56 -0000 Received: from unknown (HELO freebsd.org) (64.58.1.252) by smtp.mho.net with SMTP; 7 Aug 2003 05:02:56 -0000 Message-ID: <3F31DD85.6090801@freebsd.org> Date: Wed, 06 Aug 2003 23:03:01 -0600 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4) Gecko/20030624 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Nate Lawson References: <1695190000.1060183917@aslan.scsiguy.com> <20030806093347.N73637@root.org> <20030806123207.F4081@pooker.samsco.home> <20030806213643.F74720@root.org> In-Reply-To: <20030806213643.F74720@root.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: "'freebsd-scsi@freebsd.org'" cc: "'aic7xxx@freebsd.org'" cc: Scott Subject: Re: Ongoing U320 AIC7902 Seagate ST318453LW issues, SCB timed out X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Aug 2003 05:03:01 -0000 Nate Lawson wrote: > On Wed, 6 Aug 2003, Scott wrote: > >>On Wed, 6 Aug 2003, Nate Lawson wrote: >> >>>On Wed, 6 Aug 2003, Justin T. Gibbs wrote: >>> >>>>>I offer this patch to make a loader tunable out of the maximum >>>>>tags supported. >>>> >>>>It should be a cam tunable. >>> >>>Terse. I think he means it should be "kern.cam.ahd%d.max_tags" >> >>I'll go out on a limb and suggest 'kern.cam.da%d.max_tags" or something >>similar, as this will be useful for more than just the Adaptec chip. > > > Max tags is a property of cam (i.e. cam_sim_alloc()) and thus not a scsi > (da(4)) issue. > > -Nate Not neccesarily. As Justin pointed out, having global and per-device settings are both useful. One could have a bus full of well-behaving Fujitsu drives, but have one ill-behaving Seagate. Why penalize the whole system? Cam is designed to recognise both controller and device tag limits. Scott