From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764756AbYEUOpz (ORCPT ); Wed, 21 May 2008 10:45:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755285AbYEUOpp (ORCPT ); Wed, 21 May 2008 10:45:45 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:41618 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754114AbYEUOpp (ORCPT ); Wed, 21 May 2008 10:45:45 -0400 Date: Wed, 21 May 2008 09:48:40 -0500 From: Cliff Wickman To: dmitry.adamushko@gmail.com, avi@qumranet.com, mingo@elte.hu, heiko.carstens@de.ibm.com, a.p.zijlstra@chello.nl, vatsa@linux.vnet.ibm.com Cc: Avi Kivity , linux-kernel , Ingo Molnar , Heiko Carstens , PeterZijlst@sgi.com Subject: [BUG] hotplug cpus on ia64 Message-ID: <20080521144840.GA32628@sgi.com> References: <4829A6A0.5040208@qumranet.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Gentlemen, I built an ia64 kernel from Andrew's tree (2.6.26-rc2-mm1) and get a very predictable hotplug cpu problem. billberry1:/tmp/cpw # ./dis disabled cpu 17 enabled cpu 17 billberry1:/tmp/cpw # ./dis disabled cpu 17 enabled cpu 17 billberry1:/tmp/cpw # ./dis The script that disables the cpu always hangs (unkillable) on the 3rd attempt. I haven't spent any debugging time on it yet. Just wondering if you've seen it? It doesn't seem to happen x86_64. -Cliff Wickman cpw@sgi.com