linux-kernel - Re: [PATCH] Documentation / cpu hotplug: remove outdated description for MADT entries

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Message-Id: <1371789019.2776.139@driftwood>
Date:	Thu, 20 Jun 2013 23:30:19 -0500
From:	Rob Landley <rob@...dley.net>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	linux-acpi@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, patches@...aro.org,
	linaro-kernel@...ts.linaro.org, Hanjun Guo <hanjun.guo@...aro.org>,
	trivial@...nel.org
Subject: Re: [PATCH] Documentation / cpu hotplug: remove outdated
 description for MADT entries

On 06/20/2013 03:54:42 AM, Hanjun Guo wrote:
> More than 256 entries in ACPI MADT is supported from ACPI 3.0  
> Specification,
> So the outdated description for MADT entries should be removed.
> 
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> ---
>  Documentation/cpu-hotplug.txt |    3 ---
>  1 file changed, 3 deletions(-)

Acked-by: Rob Landley <rob@...dley.net>

> diff --git a/Documentation/cpu-hotplug.txt  
> b/Documentation/cpu-hotplug.txt
> index 9f40135..2e36e40 100644
> --- a/Documentation/cpu-hotplug.txt
> +++ b/Documentation/cpu-hotplug.txt
> @@ -370,9 +370,6 @@ A: There is no clear spec defined way from ACPI  
> that can give us that
>     CPUs in MADT as hotpluggable CPUS.  In the case there are no  
> disabled CPUS
>     we assume 1/2 the number of CPUs currently present can be  
> hotplugged.
> 
> -   Caveat: Today's ACPI MADT can only provide 256 entries since the  
> apicid field
> -   in MADT is only 8 bits.
> -
>  User Space Notification
> 
>  Hotplug support for devices is common in Linux today. Its being used  
> today to
> --
> 1.7.9.5
> 
> 

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