Re: [Qemu-devel] CPU hot unplug support for x86_64

[Igor Mammedov]

On Thu, 11 Jun 2015 10:39:05 +0300
Fahri Cihan Demirci <address@hidden> wrote:

> On Tue, Jun 09, 2015 at 05:44:15PM +0200, Eduardo Otubo wrote:
> > Hello all,
> > 
> > I'm a little confused by all the email traffic I've seen on this list
> > lately so I guess asking doesn't hurt: How's the current status
> > regarding CPU hot unplug for x86_64? If there's any task left hanging
> > for testing or debugging -- or even implementing something that is not
> > done yet -- for some reason please let me know how to help. We have a
> > lot of interest on this feature for our projects.
> > 
> > Regards,
> > 
> > -- 
> > Eduardo Otubo
> > ProfitBricks GmbH
> 
> Hello,
> 
> We are (yet another startup) are also interested in this feature and likewise 
> are willing to contribute. As Eduardo mentioned, it is not quite easy to 
> assess the progress or identify the people who require or desire any help. 
> Therefore, any kind of feedback would be most welcome. Thank you.

Here is a cpu-remove related series that need reviewing/testing:
http://lists.nongnu.org/archive/html/qemu-devel/2015-06/msg02055.html

somewhat related, but unplug could live without it:
http://lists.nongnu.org/archive/html/qemu-devel/2015-06/msg02143.html

I general we don't want to add cpu_del monitor command to compliment cpu_add 
one,
and move to device_add, device_del commands instead.
So you could look at making device_add work for x86 CPU and on top of it
add device_del support.

> 
> Best regards,
> 
> Fahri Cihan Demirci
>