From owner-freebsd-current Sun Dec 15 21:35: 3 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 590D837B401; Sun, 15 Dec 2002 21:35:02 -0800 (PST) Received: from puffin.mail.pas.earthlink.net (puffin.mail.pas.earthlink.net [207.217.120.139]) by mx1.FreeBSD.org (Postfix) with ESMTP id D02A143ED8; Sun, 15 Dec 2002 21:35:01 -0800 (PST) (envelope-from tlambert2@mindspring.com) Received: from [216.20.231.174] (helo=mindspring.com) by puffin.mail.pas.earthlink.net with asmtp (SSLv3:RC4-MD5:128) (Exim 3.33 #1) id 18Nnu9-00067G-00; Sun, 15 Dec 2002 21:35:01 -0800 Message-ID: <3DFD5B75.E9381D1A@mindspring.com> Date: Sun, 15 Dec 2002 20:49:57 -0800 From: Terry Lambert X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Greg 'groggy' Lehey Cc: "M. Warner Losh" , phk@FreeBSD.ORG, akruijff@dds.nl, DavidJohnson@Siemens.com, current@FreeBSD.ORG Subject: Re: 80386 out of GENERIC 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> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-ELNK-Trace: b1a02af9316fbb217a47c185c03b154d40683398e744b8a497e4a4fcf7e817b513459a7d5f5a8847387f7b89c61deb1d350badd9bab72f9c350badd9bab72f9c Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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