On Mon, 24 Oct 2011 12:07:40 +0200, Alexander Eichner wrote:
> https://www.virtualbox.org/manual/ch09.html#cpuhotplug [3]

 This is exacly what I'm doing. This works perfectly on my Debian 
 GNU/Linux
 Squeeze machine which is truly 64bit (and have the 
 /usr/sbin/VBoxService
 service running).

 But on my custom Debian GNU/Linux Lenny boxes (which have 64bit kernel
 and 32bit userland), it doesn't work (due to the fact that VBoxService
 won't start).

> Ejecting a CPU is bit more difficult because the path in the sysfs
> tree differs based on the kernel version.
> You have to search for the eject file in one of the directories and
> write a 1 to it to disable the CPU.
> Search for ACPI0004, LNX_CPU or ACPI_CPU directories.
> You can remove the CPU from the guest after ejecting it.

 That's not the biggest problem :). From what I can tell, the host isn't
 even getting the ... 'request' to detach a cpu. I've run acpid with 
 full
 logging and debuging, but it doesn't see it.


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