Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757981AbYHFUMO (ORCPT ); Wed, 6 Aug 2008 16:12:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751555AbYHFULo (ORCPT ); Wed, 6 Aug 2008 16:11:44 -0400 Received: from wolverine01.qualcomm.com ([199.106.114.254]:46754 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750713AbYHFULn (ORCPT ); Wed, 6 Aug 2008 16:11:43 -0400 X-IronPort-AV: E=McAfee;i="5200,2160,5355"; a="5371481" Message-ID: <489A057E.8090405@qualcomm.com> Date: Wed, 06 Aug 2008 13:11:42 -0700 From: Max Krasnyansky User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Li Zefan CC: Jeff Chua , lkml Subject: Re: 2.6.27rc1 cannot boot more than 8CPUs References: <48991B07.3050500@qualcomm.com> <48992085.3050203@qualcomm.com> <48992D35.9020005@qualcomm.com> <48992E5A.3050303@cn.fujitsu.com> In-Reply-To: <48992E5A.3050303@cn.fujitsu.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1164 Lines: 36 Li Zefan wrote: > Max Krasnyansky wrote: >> Jeff Chua wrote: >>> On Wed, Aug 6, 2008 at 11:54 AM, Max Krasnyansky >>> wrote: >>> >>>> Are you running 32-bit kernel ? >>> Yes. But, does it matter? >> It used to. 64-bit kernel used to handle maxcpus option as documented in >> the Documentation/cpu-hotplug.txt and 32-bit one was broken. >> I just looked at the latest code and realized that both are now broken. >> They ignore cpu id > maxcpus instead of not-booting them. >> > > Yes. I have an x86_64 box with 4 cpus, but yesterday when I booted up with maxcpus=2, > I didn't see the other 2 cpus. > >> I'll send a patch that fixes that tomorrow. >> > > greate :) I just sent it and CC'ed both of you guys. [PATCH] Resurect proper handling of maxcpus= kernel option Jeff, maybe you can try again booting with maxcpus=8 and then bringing them online one by one to see where/what fails. Max -- 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/