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From: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Date: Wed, 27 Nov 2013 20:11:33 +0800
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Subject: Re: [Qemu-devel] [RFC qom-cpu v4 09/10] piix4: implement function
 cpu_status_write() for vcpu ejection
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To: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
Cc: Igor Mammedov <imammedo@redhat.com>, qemu-devel@nongnu.org, Andreas =?ISO-8859-1?Q?F=E4rber?= <afaerber@suse.de>

On Mon, 2013-11-25 at 19:38 +0100, Vasilis Liaskovitis wrote:
> On Fri, Nov 22, 2013 at 09:02:27AM +0100, Vasilis Liaskovitis wrote:
> > Hi,
> > 
> > On Wed, Oct 09, 2013 at 05:43:17PM +0800, Chen Fan wrote:
> > > When OS eject a vcpu (like: echo 1 > /sys/bus/acpi/devices/LNXCPUXX/eject),
> > > it will call acpi EJ0 method, the firmware will write the new cpumap, QEMU
> > > will know which vcpu need to be ejected.
> > 
> > I think that the _EJ0 callback (CPEJ method in hw/i386/acpi-dsdt-cpu-hotplug.dsl)
> > currently does not write the new cpumap, it only sleeps. So cpu_state_write is
> > never called on ejection, and the cpu objects remain allocated in qemu. Is there
> > an updated version of the patchseries with a CPEJ that writes the new cpumap?
> 
> oops, never mind. I missed your seabios patch mentioned in the head message,
> got it now.
> 
Ok, thanks for your attention.

> thanks,
> 
> - Vasilis