linux-kernel - Re: [PATCH v7 2/2] Documentation, x86, apic, kexec: Add disable_cpu

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Message-ID: <20131127151056.GJ18706@redhat.com>
Date:	Wed, 27 Nov 2013 10:10:56 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
Cc:	hpa@...ux.intel.com, ebiederm@...ssion.com,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	bp@...en8.de, akpm@...ux-foundation.org, fengguang.wu@...el.com,
	jingbai.ma@...com
Subject: Re: [PATCH v7 2/2] Documentation, x86, apic, kexec: Add
 disable_cpu_apicid kernel parameter

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 <d.hatayama@...fujitsu.com>

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: <int>
> +			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.
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