Date: Thu, 31 Jan 2002 13:51:37 -0500 (EST) From: Kenneth Culver <culverk@yumyumyum.org> To: "Cameron, Frank" <Cameron@ctc.com> Cc: Terry Lambert <tlambert2@mindspring.com>, David Malone <dwmalone@maths.tcd.ie>, "'freebsd-bugs@freebsd.org'" <freebsd-bugs@FreeBSD.ORG>, "'freebsd-current@freebsd.org'" <freebsd-current@FreeBSD.ORG> Subject: RE: AMD AGP Bug Message-ID: <20020131135127.V22577-100000@alpha.yumyumyum.org> In-Reply-To: <7925FCEF327F984DB5885285256F0D3AC9446F@nsc-mail1.nsc.ctc.com>
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Yeah, that's what I saw on linux-kernel... Ken On Thu, 31 Jan 2002, Cameron, Frank wrote: > 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:culverk@yumyumyum.org] > > Sent: Thursday, January 31, 2002 10:42 AM > > To: Terry Lambert > > Cc: David Malone; Cameron, Frank; 'freebsd-bugs@freebsd.org'; > > 'freebsd-current@freebsd.org' > > 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 majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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