Date: Thu, 31 Jan 2002 19:22:25 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Peter Wemm <peter@wemm.org> Cc: Kenneth Culver <culverk@yumyumyum.org>, "Cameron, Frank" <Cameron@ctc.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: <3C5A09F1.CD638C3E@mindspring.com> References: <20020201022112.227833809@overcee.wemm.org>
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Peter Wemm wrote: > We need to use the PAT cpu_features feature. This gives us 8 page attribute > modes instead of simple no-cache / writethrough flags. We can (and must) > control more carefully the speculative hardware prefetch, for example. > > I've been thinking about this with the pmap revamp that I'm working on. > It may solve the athlon problems too. This sounds cool. Do you have references to the page attribute stuff? The books I have here don't discuss it; the only thing I see are 3 bits (9,10,11) that are "available" in the PDE and PTE? -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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