Re: [PATCH] Documentation / cpu hotplug: remove outdated description for MADT entries
From: Rafael J. Wysocki
Date: Thu Jun 20 2013 - 15:43:38 EST
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 So the outdated description for MADT entries should be removed.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
> Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
> 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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