From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: [PATCH] Documentation / cpu hotplug: remove outdated description for MADT entries Date: Thu, 20 Jun 2013 21:52:51 +0200 Message-ID: <3504197.mRYUAZnZ9p@vostro.rjw.lan> References: <1371718482-452-1-git-send-email-hanjun.guo@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <1371718482-452-1-git-send-email-hanjun.guo@linaro.org> Sender: linux-doc-owner@vger.kernel.org To: Hanjun Guo Cc: Rob Landley , Rusty Russell , Srivatsa Vaddagiri , linux-acpi@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, patches@linaro.org, linaro-kernel@lists.linaro.org List-Id: linux-acpi@vger.kernel.org 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 So the outdated description for MADT entries should be removed.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 > --- > 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.