From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 5 May 2001 12:35:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 5 May 2001 12:34:53 -0400 Received: from mako.theneteffect.com ([63.97.58.10]:15633 "EHLO mako.theneteffect.com") by vger.kernel.org with ESMTP id ; Sat, 5 May 2001 12:34:33 -0400 From: Mitch Adair Message-Id: <200105051634.LAA02026@mako.theneteffect.com> Subject: Re: [PATCH] CPU hot swap for 2.4.3 + s390 support To: cw@f00f.org (Chris Wedgwood) Date: Sat, 5 May 2001 11:34:16 -0500 (CDT) Cc: linux-kernel@vger.kernel.org In-Reply-To: <20010506033746.A30690@metastasis.f00f.org> from "Chris Wedgwood" at May 06, 2001 03:37:46 AM X-Mailer: ELM [version 2.5 PL3] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > Adding memory probably isn't going to be too hard... but taking > existing memory off line is tricky. You have to find some way of > finding all the pages that are in use and then dealing with them > appropriately, and when some are locked or contain kernel data this > would be extremely difficult I should think. Wouldn't that be lot of the same issues as a "swapoff" with some portion of that in use? (except for the kernel data case of course...) M