Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161027AbVJHAxU (ORCPT ); Fri, 7 Oct 2005 20:53:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161026AbVJHAxT (ORCPT ); Fri, 7 Oct 2005 20:53:19 -0400 Received: from ozlabs.org ([203.10.76.45]:46771 "EHLO ozlabs.org") by vger.kernel.org with ESMTP id S1161027AbVJHAxT (ORCPT ); Fri, 7 Oct 2005 20:53:19 -0400 Date: Sat, 8 Oct 2005 10:50:16 +1000 From: Anton Blanchard To: Andi Kleen Cc: Brian Gerst , lkml , Andrew Morton Subject: Re: [PATCH] Fix hotplug cpu on x86_64 Message-ID: <20051008005016.GG5210@krispykreme> References: <43437DEB.4080405@didntduck.org> <434414C4.8020109@didntduck.org> <4345F656.9020601@didntduck.org> <20051007095041.GK6642@verdi.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051007095041.GK6642@verdi.suse.de> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 679 Lines: 18 Hi, > I also have a followon patch to avoid the extreme memory wastage > currently caused by hotplug CPUs (e.g. with NR_CPUS==128 you currently > lose 4MB of memory just for preallocated per CPU data). But that is > something for post 2.6.14. Im interested in doing that on ppc64 too. Are you currently only creating per cpu data areas for possible cpus? The generic code does NR_CPUS worth, we should change that in 2.6.15. Anton - 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/