Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756225AbXE3P5T (ORCPT ); Wed, 30 May 2007 11:57:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753551AbXE3P5G (ORCPT ); Wed, 30 May 2007 11:57:06 -0400 Received: from www.osadl.org ([213.239.205.134]:49660 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751632AbXE3P5F (ORCPT ); Wed, 30 May 2007 11:57:05 -0400 Subject: Re: add_timer_on and CONFIG_NO_HZ From: Thomas Gleixner To: Joe Korty Cc: linux-kernel@vger.kernel.org, Ingo Molnar In-Reply-To: <20070530132844.GA3630@tsunami.ccur.com> References: <20070530132844.GA3630@tsunami.ccur.com> Content-Type: text/plain Date: Wed, 30 May 2007 17:57:00 +0200 Message-Id: <1180540620.3930.1.camel@chaos> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 (2.10.1-4.fc7) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 640 Lines: 19 Joe, On Wed, 2007-05-30 at 09:28 -0400, Joe Korty wrote: > Hi Thomas, > It seems that when add_timer_on() is used to put a timer > on another cpu's timer queue, that remote cpu should be > made to reprogram its hardware APIC timer, when CONFIG_NO_HZ=y > and the new timer is put at the front of the timer wheel. indeed, that makes sense. I look into this. Thanks for pointing it out. tglx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/