From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756530Ab3K0PLh (ORCPT ); Wed, 27 Nov 2013 10:11:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35577 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756113Ab3K0PLf (ORCPT ); Wed, 27 Nov 2013 10:11:35 -0500 Date: Wed, 27 Nov 2013 10:10:56 -0500 From: Vivek Goyal To: HATAYAMA Daisuke Cc: hpa@linux.intel.com, ebiederm@xmission.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, bp@alien8.de, akpm@linux-foundation.org, fengguang.wu@intel.com, jingbai.ma@hp.com Subject: Re: [PATCH v7 2/2] Documentation, x86, apic, kexec: Add disable_cpu_apicid kernel parameter Message-ID: <20131127151056.GJ18706@redhat.com> References: <20131127020006.1493.86091.stgit@localhost6.localdomain6> <20131127020053.1493.54092.stgit@localhost6.localdomain6> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131127020053.1493.54092.stgit@localhost6.localdomain6> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 27, 2013 at 11:00:53AM +0900, HATAYAMA Daisuke wrote: > Add disable_cpu_apicid kernel parameter to disable the CPU with the > specified number of initial APIC ID, mostly used for the kdump 2nd > kernel to disable BSP to wake up multiple CPUs without causing system > reset or hang due to sending INIT from AP to BSP. > > Signed-off-by: HATAYAMA Daisuke I guess you don't require a separate patch for documentation. Just merge it with previous patch. So this becomes a single patch fix and not a series. Thanks Vivek > --- > Documentation/kernel-parameters.txt | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt > index 50680a5..dd77bec 100644 > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -774,6 +774,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted. > disable= [IPV6] > See Documentation/networking/ipv6.txt. > > + disable_cpu_apicid= [X86,APIC,KEXEC,SMP] > + Format: > + The number of initial APIC ID for the > + corresponding CPU to be disabled at boot, > + mostly used for the kdump 2nd kernel to > + disable BSP to wake up multiple CPUs without > + causing system reset or hang due to sending > + INIT from AP to BSP. > + > disable_ddw [PPC/PSERIES] > Disable Dynamic DMA Window support. Use this if > to workaround buggy firmware.