Re: [Qemu-devel] [RFC V2 10/10] cpus: reclaim allocated vCPU objects

[Igor Mammedov]

On Mon, 8 Dec 2014 10:50:21 +0000
Peter Maydell <address@hidden> wrote:

> On 8 December 2014 at 10:28, Gu Zheng <address@hidden> wrote:
> > Yes, it's a limitation now, but it is not the final implementation.
> > As to the QEMU side, the vcpu object in kernel is stateless, and a
> > reset operation will be done when we hot add a vcpu, so I think we
> > can kill the limitation, just choose a parked vcpu and reconfigure
> > it before we use it.
> 
> Why can't the kernel handle our just destroying the vcpu and
> later recreating it if necessary? That seems the more logical
> approach than trying to keep fds hanging around in userspace
> for reuse.

It's somewhat complex approach and it was suggested on KVM list to go
parking route. for more details see thread
 https://www.mail-archive.com/address@hidden/msg102839.html

> 
> -- PMM
>