From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761458AbZE3LWs (ORCPT ); Sat, 30 May 2009 07:22:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759674AbZE3LWj (ORCPT ); Sat, 30 May 2009 07:22:39 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:51661 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759666AbZE3LWj (ORCPT ); Sat, 30 May 2009 07:22:39 -0400 Date: Sat, 30 May 2009 13:22:34 +0200 From: Pavel Machek To: "H. Peter Anvin" Cc: Linus Torvalds , Linux Kernel Mailing List , Ingo Molnar , "Thomas Gleixner Suresh Siddha" , Tejun Heo , Venkatesh Pallapadi , Zhang Rui Subject: Re: [GIT PULL] x86 fixes for 2.6.30-rc8 Message-ID: <20090530112234.GB1395@ucw.cz> References: <200905252003.n4PK3sFi014919@voreg.hos.anvin.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200905252003.n4PK3sFi014919@voreg.hos.anvin.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -1535,6 +1535,10 @@ and is between 256 and 4096 characters. It is defined in the file > register save and restore. The kernel will only save > legacy floating-point registers on task switch. > > + noxsave [BUGS=X86] Disables x86 extended register state save > + and restore using xsave. The kernel will fallback to > + enabling legacy floating-point and sse state. > + Does that mean apps using sse8 will see their registers corrupted if this option is used? Or are new registers sets always added in a way that kernel has to enable them first? -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html