From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765673AbYCEAZE (ORCPT ); Tue, 4 Mar 2008 19:25:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755746AbYCEAYu (ORCPT ); Tue, 4 Mar 2008 19:24:50 -0500 Received: from gw.goop.org ([64.81.55.164]:38212 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757835AbYCEAYt (ORCPT ); Tue, 4 Mar 2008 19:24:49 -0500 Message-ID: <47CDE718.9090302@goop.org> Date: Tue, 04 Mar 2008 16:19:36 -0800 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.12 (X11/20080226) MIME-Version: 1.0 To: Andi Kleen CC: Ingo Molnar , "H. Peter Anvin" , Linux Kernel Mailing List Subject: Re: preempt bug in set_pmd_pfn? References: <47CDBB87.8090906@goop.org> <200803050106.31609.ak@suse.de> <47CDE42F.8080400@goop.org> <200803050116.46119.ak@suse.de> In-Reply-To: <200803050116.46119.ak@suse.de> X-Enigmail-Version: 0.95.6 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 Andi Kleen wrote: > On Wednesday 05 March 2008 01:07:11 Jeremy Fitzhardinge wrote: > >> Andi Kleen wrote: >> >>>> Won't this leave a stale tlb on the old processor? >>>> >>>> >>> __set_fixmap should be only used in early boot, so it's always >>> on CPU 0 >>> >> vdso32-setup.c:map_compat_vdso() uses it to create the compat vdso >> mapping, which typically happens on the first execve(), >> > > First execve for 32bit binaries? > Yes, 32-bit kernel. > Anyways __set_fixmap is __init and at the first execve (unless you have initramfs) > init.text should be already freed. No, its not __init. If it were I don't think there would have been much booting going on for the last few months. J