Date: Tue, 27 Oct 1998 07:39:22 -0700 (MST) From: tdaley@plc.com (Tom Daley) To: aic7xxx@FreeBSD.ORG Subject: Adaptec hang on SMP motherboard Message-ID: <199810271439.HAA23207@cos.plc.com>
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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 |
| ___ </v Woodland Park, CO |
| ___ -\ tdaley@plc.com |
| ___ / (719) 534-0449 x27 |
| (*) Linux! |
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