From owner-aic7xxx Tue Oct 27 06:40:51 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id GAA23373 for aic7xxx-outgoing; Tue, 27 Oct 1998 06:40:51 -0800 (PST) (envelope-from owner-aic7xxx@FreeBSD.ORG) Received: from prologic.com (mail.plc.com [208.218.20.4]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id GAA23366 for ; Tue, 27 Oct 1998 06:40:47 -0800 (PST) (envelope-from tdaley@plc.com) Received: from cos.plc.com(192.168.1.75) by prologic.plc.com via smap (V2.1) id xma004595; Tue, 27 Oct 98 09:39:34 -0500 Received: by cos.plc.com (SMI-8.6/SMI-SVR4) id HAA23207; Tue, 27 Oct 1998 07:39:22 -0700 From: tdaley@plc.com (Tom Daley) Message-ID: <199810271439.HAA23207@cos.plc.com> Subject: Adaptec hang on SMP motherboard To: aic7xxx@FreeBSD.ORG Date: Tue, 27 Oct 1998 07:39:22 -0700 (MST) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-aic7xxx@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I converted the BSD Adaptec driver to work on another OS here at work. I have one problem that is still nagging me and was wondering if anyone here had any insights. The driver works great on many systems. I have even changed it to work on PowerPC (after swapping some bytes around). The problem I see is that the driver hangs only on Dual Processor motherboards that have one processor installed. I don't have any with both processors installed because our product does not support it yet. The problem happens on Pentium Pro and Pentium II SMP motherboards. I have tried the driver with opennings set to 1 (one command at a time) and in polling mode (no interrupts) which only submits one command at a time as well. I have also added debugging info that is written directly to video memory and cannot see anything bad with commands being sent to the controller. The driver runs for a few seconds then the drive light stays on (perhaps a SCSI bus hang) for a while and the command(s) timeout. Is there somthing about a Dual Processor motherboard (with only one processor installed) that could cause a problem like this? -- ------------------------------------------------------------------- | o Tom Daley | | ___