From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755211Ab2DWKtS (ORCPT ); Mon, 23 Apr 2012 06:49:18 -0400 Received: from mga11.intel.com ([192.55.52.93]:23937 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754225Ab2DWKtQ (ORCPT ); Mon, 23 Apr 2012 06:49:16 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="144801114" From: Andi Kleen To: HATAYAMA Daisuke Subject: Re: [PATCH 2/2] Enter 2nd kernel with BSP References: <20120416021951.9303.58568.stgit@localhost6.localdomain6> <20120416022139.9303.56284.stgit@localhost6.localdomain6> cc: linux-kernel@vger.kernel.org, fenghua.yu@intel.com Date: Mon, 23 Apr 2012 03:49:15 -0700 In-Reply-To: <20120416022139.9303.56284.stgit@localhost6.localdomain6> (HATAYAMA Daisuke's message of "Mon, 16 Apr 2012 11:21:39 +0900") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Split logic into BSP's and AP's: BSP waits for AP halting. > > Don't remove variable crashing_cpu for debugging use; useful for > determining one what CPU crash happens. Fenghua has this patchkit to allow offlining the BSP. What happens then? It would be good to understand why initializing APs from other APs should not work. Not aware of such a limitation in x86. AFAIK when we online a random cpu after boot there is no effort to do it from BSP. Why does that work and not from the kexec boot? -Andi -- ak@linux.intel.com -- Speaking for myself only