From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755349AbaCMVBP (ORCPT ); Thu, 13 Mar 2014 17:01:15 -0400 Received: from mga02.intel.com ([134.134.136.20]:48683 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754593AbaCMVBN (ORCPT ); Thu, 13 Mar 2014 17:01:13 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,649,1389772800"; d="scan'208";a="499451358" Date: Thu, 13 Mar 2014 14:00:10 -0700 From: Andi Kleen To: "H. Peter Anvin" Cc: Linus Torvalds , Pavel Emelyanov , Andy Lutomirski , Ingo Molnar , Cyrill Gorcunov , Stefani Seibold , "linux-kernel@vger.kernel.org" , Greg KH , Andrea Arcangeli , Andreas Brief , John Stultz , Thomas Gleixner , Andy Shevchenko , Martin Runge , the arch/x86 maintainers Subject: Re: [PATCH 3/3] x86, vdso32: handle 32 bit vDSO larger one page Message-ID: <20140313210010.GB3793@tassilo.jf.intel.com> References: <5321F418.1030304@zytor.com> <5321F72E.7030109@zytor.com> <8cf1b00c-ef93-4ad0-97f7-53888b50d160@email.android.com> <53220DEB.6030902@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53220DEB.6030902@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 13, 2014 at 12:58:35PM -0700, H. Peter Anvin wrote: > On 03/13/2014 12:37 PM, Linus Torvalds wrote: > > There are big advantages to "minimal code" at fixed addresses. The > > vdso=native thing fills the page with 0xcc just to not give useful > > instructions (still on my phone, so that may be a bogus memory) > > > > That said, I doubt we care just for OpenSUSE 9. Let it be slower. > > Yes. At some point the majority of my nfsroot test image were OpenSUSE 9. It was the last opensuse system that booted fast without udev or initrd :-) I have mostly retired them by now, but still occasional usage. So that why i would prefer to not cripple it. -Andi