From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932713AbXCEN7U (ORCPT ); Mon, 5 Mar 2007 08:59:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932791AbXCEN7U (ORCPT ); Mon, 5 Mar 2007 08:59:20 -0500 Received: from ns.suse.de ([195.135.220.2]:51660 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932713AbXCEN7T (ORCPT ); Mon, 5 Mar 2007 08:59:19 -0500 Date: Mon, 5 Mar 2007 15:58:47 +0100 From: Andi Kleen To: Ingo Molnar Cc: Andi Kleen , Avi Kivity , Andrew Morton , linux-kernel@vger.kernel.org, Roland McGrath , Rusty Russell Subject: Re: [patch] paravirt: VDSO page is essential Message-ID: <20070305145847.GH22829@bingen.suse.de> References: <20070305120631.GA14105@elte.hu> <45EC0EB7.7080300@qumranet.com> <20070305142820.GD22829@bingen.suse.de> <20070305134854.GA31542@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070305134854.GA31542@elte.hu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 05, 2007 at 02:48:54PM +0100, Ingo Molnar wrote: > > * Andi Kleen wrote: > > > The problem is not the syscall instruction, but some problem with the > > way the vDSO mapping is set up with CONFIG_PARAVIRT that broke older > > glibc. > > the problem is that CONFIG_PARAVIRT silently turns off > CONFIG_COMPAT_VDSO, which of course breaks 'old' glibc. This too is a > must-have fix for v2.6.21. We seem to have different definitions of must-have. I think we would need to have a paravirt ops callback to decide this first. But it doesn't look critical to me anyways. -Andi