From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753499Ab2IGTV7 (ORCPT ); Fri, 7 Sep 2012 15:21:59 -0400 Received: from mga14.intel.com ([143.182.124.37]:18732 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751024Ab2IGTV6 (ORCPT ); Fri, 7 Sep 2012 15:21:58 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,387,1344236400"; d="scan'208";a="190163324" Subject: Re: [PATCH 2/3] x86, fpu: enable eagerfpu by default for xsaveopt From: Suresh Siddha Reply-To: Suresh Siddha To: "H. Peter Anvin" Cc: mingo@kernel.org, torvalds@linux-foundation.org, andreas.herrmann3@amd.com, bp@amd64.org, robert.richter@amd.com, linux-kernel@vger.kernel.org Date: Fri, 07 Sep 2012 12:20:56 -0700 In-Reply-To: <504A403F.10501@zytor.com> References: <1347042703-11128-1-git-send-email-suresh.b.siddha@intel.com> <1347042703-11128-2-git-send-email-suresh.b.siddha@intel.com> <504A403F.10501@zytor.com> Organization: Intel Corp Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.0.3 (3.0.3-1.fc15) Content-Transfer-Encoding: 7bit Message-ID: <1347045657.26695.64.camel@sbsiddha-desk.sc.intel.com> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2012-09-07 at 11:43 -0700, H. Peter Anvin wrote: > On 09/07/2012 11:31 AM, Suresh Siddha wrote: > > > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt > > index 6273099..b21bcbd 100644 > > --- a/Documentation/kernel-parameters.txt > > +++ b/Documentation/kernel-parameters.txt > > @@ -1835,7 +1835,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. > > enabling legacy floating-point and sse state. > > > > eagerfpu= [X86] > > - on enable eager fpu restore > > + on enable eager fpu restore (default for xsaveopt) > > off disable eager fpu restore > > > > Should we make this a tristate (on, off, default/auto)? Intention is to automatically enable it for xsaveopt with out any explicit boot parameters (for the advantages I mentioned in the previous changelogs). thanks, suresh