From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261286AbVFBUNQ (ORCPT ); Thu, 2 Jun 2005 16:13:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261319AbVFBUL7 (ORCPT ); Thu, 2 Jun 2005 16:11:59 -0400 Received: from fsmlabs.com ([168.103.115.128]:35763 "EHLO fsmlabs.com") by vger.kernel.org with ESMTP id S261233AbVFBUHf (ORCPT ); Thu, 2 Jun 2005 16:07:35 -0400 Date: Thu, 2 Jun 2005 14:10:47 -0600 (MDT) From: Zwane Mwaikambo To: Ashok Raj cc: Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org, discuss@x86-64.org, Rusty Russell , Srivattsa Vaddagiri Subject: Re: [patch 5/5] x86_64: Provide ability to choose using shortcuts for IPI in flat mode. In-Reply-To: <20050602130112.159708000@araj-em64t> Message-ID: References: <20050602125754.993470000@araj-em64t> <20050602130112.159708000@araj-em64t> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2 Jun 2005, Ashok Raj wrote: > This patch provides an option to switch broadcast or use mask version > for sending IPI's. If CONFIG_HOTPLUG_CPU is defined, we choose not to > use broadcast shortcuts by default, otherwise we choose broadcast mode > as default. > > both cases, one can change this via startup cmd line option, to choose > no-broadcast mode. > > no_ipi_broadcast=1 > > This is provided on request from Andi Kleen, since he doesnt agree with > replacing IPI shortcuts as a solution for CPU hotplug. Without removing > broadcast IPI's, it would mean lots of new code for __cpu_up() path, > which would acheive the same results. > > I will send the primitive interface next as a separate patch from this > patch set. > > Signed-off-by: Ashok Raj Have you already submitted the i386 version? I think it's a sane fix. Thanks, Zwane