From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S932724AbbFIJbd (ORCPT <rfc822;w@1wt.eu>);
	Tue, 9 Jun 2015 05:31:33 -0400
Received: from casper.infradead.org ([85.118.1.10]:49222 "EHLO
	casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752849AbbFIJbY (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Tue, 9 Jun 2015 05:31:24 -0400
Date: Tue, 9 Jun 2015 11:31:20 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Borislav Petkov <bp@suse.de>
Cc: Huang Rui <ray.huang@amd.com>, Andy Lutomirski <luto@amacapital.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>,
        John Stultz <john.stultz@linaro.org>,
        =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec@gmail.com>,
        linux-kernel@vger.kernel.org, x86@kernel.org,
        Fengguang Wu <fengguang.wu@intel.com>, Aaron Lu <aaron.lu@intel.com>,
        Suravee Suthikulanit <suravee.suthikulpanit@amd.com>,
        Tony Li <tony.li@amd.com>, Ken Xue <ken.xue@amd.com>
Subject: Re: [PATCH v2 2/4] x86, mwaitt: make delay method configurable
Message-ID: <20150609093120.GS3644@twins.programming.kicks-ass.net>
References: <1433819621-15093-1-git-send-email-ray.huang@amd.com>
 <1433819621-15093-3-git-send-email-ray.huang@amd.com>
 <20150609090543.GA22105@pd.tnic>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20150609090543.GA22105@pd.tnic>
User-Agent: Mutt/1.5.21 (2012-12-30)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, Jun 09, 2015 at 11:05:43AM +0200, Borislav Petkov wrote:
> And we did talk about this already in the last review. You guys want to
> drop all those kernel parameters and use MWAITX delay by default when:
> 
> 1. HW supports MWAITX
> 
> *and*
> 
> 2. delay fits in u32.

No, that 2. is just retarded, see my other email. Always use mwaitx,
just call it multiple times if you want to wait longer.