>From what was posted on the linux-kernel list the problem is the OS
doing the wrong thing not the hardware.  I originally asked the
question (albeit not worded as clearly as I should have) because if
Microsoft and Linux programmers made the same mistake, might
FreeBSD have also.

> -----Original Message-----
> From: Kenneth Culver [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, January 31, 2002 10:42 AM
> To: Terry Lambert
> Cc: David Malone; Cameron, Frank; '[EMAIL PROTECTED]';
> 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

To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-current" in the body of the message

Reply via email to