[Qemu-devel] Re: KVM call agenda for Apr 27

[Anthony Liguori]

On 04/26/2010 05:12 PM, Chris Wright wrote:
> * Anthony Liguori (address@hidden) wrote:
>    
> > On 04/26/2010 12:26 PM, Chris Wright wrote:
> >      
> > > Please send in any agenda items you are interested in covering.
> > >
> > > While I don't expect it to be the case this week, if we have a
> > > lack of agenda items I'll cancel the week's call.
> > >        
> > - qemu management interface (and libvirt)
> > - stable tree policy (push vs. pull and call for stable volunteers)
> >      
> block plug in (follow-on from qmp block watermark)
>    

A few comments:

1) The problem was not block watermark itself but generating a 
notification on the watermark threshold.  It's a heuristic and should be 
implemented based on polling block stats.  Otherwise, we'll be adding 
tons of events to qemu that we'll struggle to maintain.

2) A block plugin doesn't solve the problem if it's just at the 
BlockDriverState level because it can't interact with qcow2.

3) For general block plugins, it's probably better to tackle userspace 
block devices.  We have CUSE and FUSE already, a BUSE is a logical 
conclusion.

Regards,

Anthony Liguori