[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <2689985.7MvxW2GhJV@vostro.rjw.lan>
Date: Mon, 24 Jun 2013 14:00:53 +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Subject: Re: [PATCH v2] Documentation / cpu hotplug: Rephrase the outdated description for MADT entries
On Friday, June 21, 2013 05:09:18 PM Hanjun Guo wrote:
> More than 256 entries in ACPI MADT is supported from ACPI 3.0, so the
> information should be updated.
>
> -v2: Rephrase the information instead of simply removing it according
> to Rafael's advice.
Queued up for 3.11.
Thanks,
Rafael
> Suggested-by: Rafael J. Wysocki <rjw@...k.pl>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
> ---
> Documentation/cpu-hotplug.txt | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt
> index 9f40135..67f733d 100644
> --- a/Documentation/cpu-hotplug.txt
> +++ b/Documentation/cpu-hotplug.txt
> @@ -370,8 +370,10 @@ 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.
> + Caveat: ACPI MADT can only provide 256 entries in systems with only ACPI 2.0c
> + or earlier ACPI version supported, because the apicid field in MADT is only
> + 8 bits. From ACPI 3.0, this limitation was removed since the apicid field
> + was extended to 32 bits with x2APIC introduced.
>
> User Space Notification
>
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists