Date: Sun, 15 Dec 2002 20:49:57 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Greg 'groggy' Lehey <grog@FreeBSD.org> Cc: "M. Warner Losh" <imp@bsdimp.com>, phk@FreeBSD.ORG, akruijff@dds.nl, DavidJohnson@Siemens.com, current@FreeBSD.ORG Subject: Re: 80386 out of GENERIC Message-ID: <3DFD5B75.E9381D1A@mindspring.com> References: <635948263.20021214220720@dds.nl> <24244.1039900460@critter.freebsd.dk> <20021214.173219.116676673.imp@bsdimp.com> <3DFC0B29.FD6F7F18@mindspring.com> <20021215223405.GA97271@wantadilla.lemis.com>
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Greg 'groggy' Lehey wrote: > > Add to this that Bosko's workaround for the CPU bug with PSE/PGE > > includes loading the kernel at 4M rather than 1M. > > I'm not sure I understand you. i386's have a 32 bit address space, > and long ago we loaded at 0xf0000000 (3.75M). Then we dropped it to > 0xc0000000 (3M). 4M is the end of the address space. Are you talking > about something else? The load is at physical 4M. It avoids the 4K/4M page switch, and has two side effects which make it work without DISABLE_PSE et al. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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