linux-kernel - Re: [PATCH v9] x86, apic, kexec, Documentation: Add disable_cpu

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Date:	Tue, 3 Dec 2013 10:25:36 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Borislav Petkov <bp@...en8.de>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jingbai Ma <jingbai.ma@...com>,
	Jerry Hoemann <jerry.hoemann@...com>
Subject: Re: [PATCH v9] x86, apic, kexec, Documentation: Add disable_cpu_apic
 kernel parameter

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?

Thanks
Vivek
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