From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vo5uV-0003Q3-MG for kexec@lists.infradead.org; Wed, 04 Dec 2013 06:26:13 +0000 Received: from m2.gw.fujitsu.co.jp (unknown [10.0.50.72]) by fgwmail6.fujitsu.co.jp (Postfix) with ESMTP id E1A323EE0BC for ; Wed, 4 Dec 2013 15:25:44 +0900 (JST) Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id D21AA45DE52 for ; Wed, 4 Dec 2013 15:25:44 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.nic.fujitsu.com [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id B75EE45DE4D for ; Wed, 4 Dec 2013 15:25:44 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id AA78CE38001 for ; Wed, 4 Dec 2013 15:25:44 +0900 (JST) Received: from m1001.s.css.fujitsu.com (m1001.s.css.fujitsu.com [10.240.81.139]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 5E1E51DB803A for ; Wed, 4 Dec 2013 15:25:44 +0900 (JST) Message-ID: <529ECAAB.8040309@jp.fujitsu.com> Date: Wed, 04 Dec 2013 15:24:43 +0900 From: HATAYAMA Daisuke MIME-Version: 1.0 Subject: Re: [PATCH v9] x86, apic, kexec, Documentation: Add disable_cpu_apic kernel parameter References: <529D34AA.1000809@jp.fujitsu.com> <20131203152536.GE4251@redhat.com> <529E9CA6.5040200@jp.fujitsu.com> In-Reply-To: <529E9CA6.5040200@jp.fujitsu.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Vivek Goyal Cc: "H. Peter Anvin" , "kexec@lists.infradead.org" , Linux Kernel Mailing List , Jerry Hoemann , Borislav Petkov , "Eric W. Biederman" , Andrew Morton , Fengguang Wu , Jingbai Ma (2013/12/04 12:08), HATAYAMA Daisuke wrote: > (2013/12/04 0:25), Vivek Goyal wrote: >> On Tue, Dec 03, 2013 at 10:32:26AM +0900, HATAYAMA Daisuke wrote: >> >> [..] >>> >>> 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] >> >> Hi Hatayama, >> >> We are almost there. A minor nit. Why have we specified KEXEC here. This >> parameter disabled_cpu_apicid does not seem to dependon CONFIG_KEXEC? >> >> Jerry, this patch looks good to me. Does it work on your system? >> > > Because primary user for the option is currently kexec/kdump only. > > I referred to acpi_rsdp description: > > acpi_rsdp= [ACPI,EFI,KEXEC] > Pass the RSDP address to the kernel, mostly used > on machines running EFI runtime service to boot the > second kernel for kdump. > Indo-san, who introduced acpi_rsdp and KEXEC tag, told me that historical reason why KEXEC tag was introduced. disable_cpu_apicid is generic at least in the current version, so the tag doesn't need to be specified here. I'll post a new version soon. -- Thanks. HATAYAMA, Daisuke _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec