linux-kernel - Re: [PATCH] Documentation / cpu hotplug: remove outdated description for MADT entries

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Message-ID: <3504197.mRYUAZnZ9p@vostro.rjw.lan>
Date:	Thu, 20 Jun 2013 21:52:51 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	Rob Landley <rob@...dley.net>,
	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
Subject: Re: [PATCH] Documentation / cpu hotplug: remove outdated description for MADT entries

On Thursday, June 20, 2013 04:54:42 PM 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 So the outdated description for MADT entries should be removed.

Well, it kind of is still valid for systems pre-dating ACPI 3.0, isn't it?

So perhaps instead of simply removing that information it would be better to
rephrase it?

Thanks,
Rafael


> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> ---
>  Documentation/cpu-hotplug.txt |    3 ---
>  1 file changed, 3 deletions(-)
> 
> 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
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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