From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267020AbUBSIwe (ORCPT ); Thu, 19 Feb 2004 03:52:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267055AbUBSIwe (ORCPT ); Thu, 19 Feb 2004 03:52:34 -0500 Received: from nsmtp.pacific.net.th ([203.121.130.117]:53494 "EHLO nsmtp.pacific.net.th") by vger.kernel.org with ESMTP id S267020AbUBSIwd (ORCPT ); Thu, 19 Feb 2004 03:52:33 -0500 Date: Thu, 19 Feb 2004 17:00:05 +0800 To: "Pavel Machek" Subject: Re: Reserved page flaging of 2.4 kernel memory changed recently? Cc: "Andrea Arcangeli" , "Nigel Cunningham" , linux-kernel@vger.kernel.org References: <200402050941.34155.mhf@linuxmail.org> <20040208020624.GG31926@dualathlon.random> <200402100625.41288.mhf@linuxmail.org> <20040219072629.GB467@openzaurus.ucw.cz> From: "Michael Frank" Content-Type: text/plain; charset=US-ASCII; format=flowed delsp=yes MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-ID: In-Reply-To: <20040219072629.GB467@openzaurus.ucw.cz> User-Agent: Opera M2/7.50 (Linux, build 600) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 19 Feb 2004 08:26:30 +0100, Pavel Machek wrote: > Hi! > mhf wrote: >> I actually would like to rename the bit PG_nosave to PG_donttouch ;) to make a point with regard to: no transfer of page contents during suspend/resume no netdump no debugger access without override ... but the name does not matter and we do not have to change it. > > Its used for swsusp internal data, too... Yes of course - how else would swsusp run, but these data are also not "touched" during suspend and resume wrt transfer of page content. x86 Pages for PG_nosave: Video/BIOS 0xA0000-0XFFFFF Anything reserved < max_pfn Pentium 2 broken highmem pages Driver specific areas in DMA zone are also thinkable .. or else you get mce's or possibly crashes on newer x86 HW and on 64Bit for sure. - we had a mce recently at 0xa0000 on a Athlon XP and I went digging... Regards Michael -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/