Re: cpu hotplug

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On Fri, Sep 17, 2010 at 11:39:36PM +0200, Conrad Wood wrote:
> Hi everyone,
> 
> I'm currently looking into hotplugging CPUs. 
> This exclusively with linux-guests and linux-host.
> I have found some (conflicting) information about this on the net.
> 
> As far as I read:
> * seabios doesn't support SMP (but why does the linux-guest show
> multiple cpus?)
> * there is no uniform way of informing the linux kernel that a cpu has
> added (Found references to a unisys way of doing it though, which seems
> to be still implemented)
> * the kernel needs the acpi tables to determine how many cpus it has,
> thus the support in the bios would involve an aml-compiler to
> hot-compile new acpi tables.

SeaBIOS version 0.6.1 has ACPI support for cpu-hotplug.  It's been
tested on Linux and Windows.  Search the mail archive for "cpu
hotplug" for the details.

-Kevin
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