Re: [Qemu-devel] [PATCH v4 0/6] Efficient VM backup for qemu

[Paolo Bonzini]

Il 22/02/2013 18:49, Dietmar Maurer ha scritto:
>>>> > >> unix sockets works with qemu nbd code?
>>> > >
>>> > > Sure.  nbd+unix:///exportname?socket=path is the new URI syntax, I
>>> > > honestly forgot the old one.  SCM_CREDENTIALS checks (qemu-nbd --pid
>>> > > or something like that) is not supported, but patches would be very 
>>> > > welcome.
>> > 
>> > Yes, this is better than my tcp suggestion.
> If we use nbd, how can we pass additional information to the other side, for 
> example
> information about unallocated regions?
> 

You can either send trim commands, or just skip those regions and let
the other side figure it out.

Paolo