Subject: Re: ahc bug in current? (was: ccd changed in current?)
To: Michael L. VanLoon -- <>
From: Jason Thorpe <>
List: current-users
Date: 08/29/1997 13:41:41
On Fri, 29 Aug 1997 12:09:16 -0700 
 "Michael L. VanLoon --" <> wrote:

 > OK, any idea where I can find a PCI bus analyzer?
 > BTW, you should break up your paragraphs more often. :-)
 > Maybe I'll give Adaptec a call and see if this is something they'll
 > replace for free.

Actually, I have encountered this problem before using a Myrinet interface
behind a PCI-PCI bridge.

The problems "go away" if you use i/o mapped access, rather than
memory mapped access.  The ahc driver was changed some time ago to
use memory mapped access, and I now suspect that this might be the

I may send a patch to you to try out, soon.

Jason R. Thorpe                             
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