From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753461AbaA3Pvl (ORCPT ); Thu, 30 Jan 2014 10:51:41 -0500 Received: from www84.your-server.de ([213.133.104.84]:48006 "EHLO www84.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752792AbaA3Pvj (ORCPT ); Thu, 30 Jan 2014 10:51:39 -0500 Message-ID: <1391097131.2898.5.camel@wall-e.seibold.net> Subject: Re: [PATCH 0/4] Add 32 bit VDSO time function support From: Stefani Seibold To: "H. Peter Anvin" Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de, mingo@redhat.com, ak@linux.intel.com, aarcange@redhat.com, john.stultz@linaro.org, luto@amacapital.net, xemul@parallels.com, gorcunov@openvz.org, andriy.shevchenko@linux.intel.com, Martin.Runge@rohde-schwarz.com, Andreas.Brief@rohde-schwarz.com Date: Thu, 30 Jan 2014 16:52:11 +0100 In-Reply-To: <52EA704D.2000809@zytor.com> References: <1391078953-1575-1-git-send-email-stefani@seibold.net> <52EA704D.2000809@zytor.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.8.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Authenticated-Sender: stefani@seibold.net Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Donnerstag, den 30.01.2014, 07:31 -0800 schrieb H. Peter Anvin: > On 01/30/2014 02:49 AM, stefani@seibold.net wrote: > > The VDSO page for a 32 bit resided now on 0xffffc000, followed by the VVAR and > > HPET page. > > Any reason to not move the vdso base page to the top, in order to avoid > breaking broken applications? It seems a fairly innocuous shuffle... > probably little gain, but very little cost. > > -hpa > The reason is that i get need than an additional VMA for HPET and VVAR. I seen no break of applications since the __FIXADDR_TOP is not on a fix place. Lguest, XEN, OPLC and the reservetop Kernel Parameter will change the VDSO Page Address. - Stefani