From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 27 Mar 2003 09:18:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 27 Mar 2003 09:18:50 -0500 Received: from sphinx.mythic-beasts.com ([195.82.107.246]:48400 "EHLO sphinx.mythic-beasts.com") by vger.kernel.org with ESMTP id ; Thu, 27 Mar 2003 09:18:48 -0500 From: Chris Evans To: lkml Reply-To: Chris Evans MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT User-Agent: IMP/PHP3 Imap webMail Program 2.0.11 X-Originating-IP: 217.163.5.253 Subject: CPU2 gone "missing" on 4 CPU box. Message-Id: Date: Thu, 27 Mar 2003 14:30:02 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello- I've got a very interesting problem with a 4 CPU box. I've never seen anything quite like it. After booting, all 4 CPUs seem to be available (e.g. /proc/cpuinfo sees them all), but one of them is never used for anything. It always stays at 100% idle. So it is effectively a 3 CPU box :-( There is a highly suspicious entry in the kernel logs after bootup. It shows some differing values for the CPU which does not come up properly. Here is the entry: cpu: 0, clocks: 996796, slice: 199359 CPU0 cpu: 1, clocks: 996796, slice: 199359 cpu: 2, clocks: 996796, slice: 199359 cpu: 3, clocks: 996796, slice: 199359 CPU2 CPU1 CPU3 As you can see, CPU2 has some weird looking values for "T1" and "D", compared with CPU0, CPU1 and CPU3. Has anyone seen anything like this? The kernel is: Linux 2.4.9-e.12enterprise #1 SMP Tue Feb 11 01:29:18 EST 2003 i686 unknown I'm not entirely sure what the hardware is because the machine is remote. Thanks in advance. Chris