From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932519Ab2IQTLH (ORCPT ); Mon, 17 Sep 2012 15:11:07 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:42391 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757190Ab2IQTLG (ORCPT ); Mon, 17 Sep 2012 15:11:06 -0400 Date: Mon, 17 Sep 2012 21:11:08 +0200 From: Pavel Machek To: Suresh Siddha Cc: hpa@zytor.com, mingo@kernel.org, torvalds@linux-foundation.org, andreas.herrmann3@amd.com, bp@amd64.org, robert.richter@amd.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 1/5] x86, fpu: decouple non-lazy/eager fpu restore from xsave Message-ID: <20120917191107.GA30665@elf.ucw.cz> References: <1347300665-6209-1-git-send-email-suresh.b.siddha@intel.com> <1347300665-6209-2-git-send-email-suresh.b.siddha@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1347300665-6209-2-git-send-email-suresh.b.siddha@intel.com> X-Warning: Reading this can be dangerous to your mental health. 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 Hi! irely omitted. > and restore using xsave. The kernel will fallback to > enabling legacy floating-point and sse state. > > + eagerfpu= [X86] > + on enable eager fpu restore > + off disable eager fpu restore > + Hmm. Only useful piece of information here is that this is about FPU _restore_. Otherwise it tells the user exactly nothing. Why would user want to enable it? Disable it? What is the default? Pavel