Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752953AbYAYAGr (ORCPT ); Thu, 24 Jan 2008 19:06:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750972AbYAYAGk (ORCPT ); Thu, 24 Jan 2008 19:06:40 -0500 Received: from terminus.zytor.com ([198.137.202.10]:38119 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751130AbYAYAGk (ORCPT ); Thu, 24 Jan 2008 19:06:40 -0500 Message-ID: <47992710.2060108@zytor.com> Date: Thu, 24 Jan 2008 16:02:24 -0800 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Jeremy Fitzhardinge CC: Ian Campbell , Ingo Molnar , =?UTF-8?B?TWlrYSBQZW50dGlsw6Q=?= , linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , "Eric W. Biederman" Subject: Re: [PATCH] x86: Construct 32 bit boot time page tables in native format. References: <1200758937-22386-2-git-send-email-ijc@hellion.org.uk> <47939363.8040603@kolumbus.fi> <1200950633.15491.21.camel@cthulhu.hellion.org.uk> <479510CE.7010706@zytor.com> <1200951996.15491.28.camel@cthulhu.hellion.org.uk> <479551FD.5040801@zytor.com> <1201023401.5643.52.camel@localhost.localdomain> <479634A9.1090908@zytor.com> <1201031325.15491.66.camel@cthulhu.hellion.org.uk> <47964B7B.9000905@zytor.com> <20080122203611.GA12892@elte.hu> <1201121530.30671.15.camel@cthulhu.hellion.org.uk> <4797E487.8010108@goop.org> <1201167544.30671.64.camel@cthulhu.hellion.org.uk> <47990BDC.4070008@zytor.com> <479912B0.2080506@goop.org> <479913BA.8000506@zytor.com> <47991809.9060903@goop.org> <47991A6C.8060007@zytor.com> <479921F5.9020902@goop.org> <479922D0.3010708@zytor.com> <4799248F.9080404@goop.org> In-Reply-To: <4799248F.9080404@goop.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 940 Lines: 22 Jeremy Fitzhardinge wrote: > H. Peter Anvin wrote: >> Yes. We'd use it during initialization and at other times when we >> need trampolining, but give the swapper something which only has the >> kernel map. > > Hm, though Xen makes it all a bit more complex, as usual. In the PAE > case it wouldn't allow the pmd to be shared, so you'd have to allocate a > new pmd and copy into it. There's probably a way to deal with it within > the existing paravirt hooks... > Yeah, I'm aware of this particular piece of Xen braindamage, and although I had some very unkind words to say about it, it mirrors what we have to do for the !PAE case anyway, so it can be sort of glossed over. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/