From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754510Ab3F0UiS (ORCPT ); Thu, 27 Jun 2013 16:38:18 -0400 Received: from merlin.infradead.org ([205.233.59.134]:37264 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754243Ab3F0UiR (ORCPT ); Thu, 27 Jun 2013 16:38:17 -0400 Date: Thu, 27 Jun 2013 22:37:33 +0200 From: Peter Zijlstra To: Andy Lutomirski Cc: David Ahern , Ingo Molnar , LKML , tglx@linutronix.de Subject: Re: deadlock in scheduler enabling HRTICK feature Message-ID: <20130627203733.GC29209@dyad.programming.kicks-ass.net> References: <51CA0622.8010105@gmail.com> <20130625211713.GA18796@laptop.programming.kicks-ass.net> <51CA0980.8010409@gmail.com> <20130626070533.GA3601@dyad.programming.kicks-ass.net> <51CB1AE9.5090709@gmail.com> <20130627104309.GQ28407@twins.programming.kicks-ass.net> <20130627105303.GD27378@dyad.programming.kicks-ass.net> <51CC8FEC.8030605@mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51CC8FEC.8030605@mit.edu> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 27, 2013 at 12:18:04PM -0700, Andy Lutomirski wrote: > Supposedly, on really new x86 systems, the TSC deadline timer is so fast > to reprogram that this isn't worth it. >>From what I've heard its not all that fast. I should play with it sometime, my SNB desktop actually has this thing.