On Thu, May 16, 2013 at 08:58:38AM -0600, Eric Blake wrote: > On 05/16/2013 06:17 AM, Michael S. Tsirkin wrote: > > On Thu, May 16, 2013 at 07:07:24PM +0800, Amos Kong wrote: > >> Introduce this new QMP event to notify management after guest changes > >> mac-table configuration. > >> > > > > This makes it easy for guest to flood management with > > spurious events. > > How about we set a flag after this, and avoid sending any more > > events until management queries the filter status? > > > > Or use rate-limiting, similar to what we have done for other > guest-triggered events (such as BALLOON_CHANGE), where management can > then tweak the maximum frequency at which it is willing to receive events. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org >
I'm not sure how would management set the rate though, and any throttling here might hurt the guest, unlike the balloon. OTOH what I proposed kind of moderates itself automatically. -- MST
