From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934035AbYEVIGo (ORCPT ); Thu, 22 May 2008 04:06:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760988AbYEVIGQ (ORCPT ); Thu, 22 May 2008 04:06:16 -0400 Received: from one.firstfloor.org ([213.235.205.2]:33683 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760617AbYEVIGL (ORCPT ); Thu, 22 May 2008 04:06:11 -0400 Date: Thu, 22 May 2008 10:14:21 +0200 From: Andi Kleen To: Roland McGrath Cc: "H. Peter Anvin" , Andi Kleen , Suresh Siddha , Mikael Pettersson , mingo@elte.hu, tglx@linutronix.de, torvalds@linux-foundation.org, akpm@linux-foundation.org, drepper@redhat.com, Hongjiu.lu@intel.com, linux-kernel@vger.kernel.org, arjan@linux.intel.com, rmk+lkml@arm.linux.org.uk, dan@debian.org, asit.k.mallick@intel.com Subject: Re: [RFC] x86: xsave/xrstor support, ucontext_t extensions Message-ID: <20080522081421.GB31727@one.firstfloor.org> References: <18477.35703.679574.760417@harpo.it.uu.se> <20080518013416.GB30034@linux-os.sc.intel.com> <18481.37905.297556.288317@harpo.it.uu.se> <20080520015723.GD30034@linux-os.sc.intel.com> <4832A173.6020203@firstfloor.org> <4832E672.3090702@zytor.com> <4832E85B.4080303@firstfloor.org> <20080520201044.ED62B26FA1C@magilla.localdomain> <4834B8DB.6030504@zytor.com> <20080522004752.C399426FA24@magilla.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080522004752.C399426FA24@magilla.localdomain> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > AFAIK the only reason we control the MXCSR value is because we don't > want to handle a #GP in context switch. x86-64 actually handles it in context switch, just i386 doesn't. -Andi