Date: Thu, 31 Jan 2002 10:41:31 -0500 (EST) From: Kenneth Culver <culverk@yumyumyum.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: David Malone <dwmalone@maths.tcd.ie>, "Cameron, Frank" <Cameron@ctc.com>, "'freebsd-bugs@freebsd.org'" <freebsd-bugs@FreeBSD.ORG>, "'freebsd-current@freebsd.org'" <freebsd-current@FreeBSD.ORG> Subject: Re: AMD AGP Bug Message-ID: <20020131103927.A21783-100000@alpha.yumyumyum.org> In-Reply-To: <3C593F22.977C00FD@mindspring.com>
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> 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-bugs" in the body of the message
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