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> -----Original Message-----
> From: Kenneth Culver [mailto:culverk@xxxxxxxxxxxxx]
> Sent: Thursday, January 31, 2002 10:42 AM
> To: Terry Lambert
> Cc: David Malone; Cameron, Frank; 'freebsd-bugs@xxxxxxxxxxx';
> 'freebsd-current@xxxxxxxxxxx'
> Subject: Re: AMD AGP Bug
> > There's actually a seperate TLB bug, but FreeBSD doesn't
> > trigger that one, either (Linux can tickle it, when there
> > are certain specific circumstances met).
> >
> Well, I think I know what you're talking about, linux 
> allocates agpgart
> memory without setting a "non-cacheable" bit, and then the 
> agp card writes
> to that memory, but the cpu cached it already, which makes 
> the cache wrong
> or something like that, and causes the crashes/hangs. I know this is a
> greatly simplified version of the real problem, but I think this is a
> linux bug not necesarily an amd bug.
> Ken

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