Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932333AbWEHG3N (ORCPT ); Mon, 8 May 2006 02:29:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932337AbWEHG3N (ORCPT ); Mon, 8 May 2006 02:29:13 -0400 Received: from proof.pobox.com ([207.106.133.28]:12174 "EHLO proof.pobox.com") by vger.kernel.org with ESMTP id S932333AbWEHG3N (ORCPT ); Mon, 8 May 2006 02:29:13 -0400 Date: Mon, 8 May 2006 01:29:05 -0500 From: Nathan Lynch To: Shaohua Li Cc: lkml , Zwane Mwaikambo , Srivatsa Vaddagiri , Ashok Raj , Andrew Morton Subject: Re: [PATCH 0/10] bulk cpu removal support Message-ID: <20060508062905.GA9344@localdomain> References: <1147067137.2760.77.camel@sli10-desk.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1147067137.2760.77.camel@sli10-desk.sh.intel.com> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 975 Lines: 18 Shaohua Li wrote: > CPU hotremove will migrate tasks and redirect interrupts off dead cpu. > To remove multiple CPUs, we should iteratively do single cpu removal. > If tasks and interrupts are migrated to a cpu which will be soon > removed, then we will trash tasks and interrupts again. The following > patches allow remove several cpus one time. It's fast and avoids > unnecessary repeated trash tasks and interrupts. This will help NUMA > style hardware removal and SMP suspend/resume. Comments and suggestions > are appreciated. Some quantification of the benefits of adding this complexity would be appreciated. Like, how long does it take to offline all the cpus in a node serially, and how much faster is the bulk method? - 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/