[Qemu-devel] Re: KVM call agenda for Mar 16

[Anthony Liguori]

On 03/16/2010 05:45 AM, Daniel P. Berrange wrote:
> On Tue, Mar 16, 2010 at 12:38:02PM +0200, Avi Kivity wrote:
>    
> > On 03/16/2010 12:31 PM, Daniel P. Berrange wrote:
> >      
> > > > Polling loops are an indication that something is wrong.
> > > >
> > > >          
> > > Except when people suggest they are the right answer, qcow high
> > > watermark ;-P
> > >
> > >        
> > I liked Anthony's suggestion of an lvm2 block format driver.  No polling.
> >      
> Doesn't that require giving QEMU privileges to perform LVM operations which
> implies QEMU having CAP_SYS_ADMIN  ?
>    

If QEMU is able to resize an LVM partition, it needs to carry privileges.

I'm not sure how this can be done safely in a lesser privileged 
environment.  Presumably, you're over committing storage and there's not 
much you can do if the guests exhaust their storage all at once.

Regards,

Anthony Liguori

> Daniel
>