[Spice-devel] [PATCH] qxl: make sure primary surface is saved on migration also in compat mode

[Gerd Hoffmann]

  Hi,

> I can do it, by retrieving the surfaces addresses from the tracked guest
> commands.

Exactly.

> However, if we already do it, it would be even better if we
> just dirty only the areas that are actually modified by the update_area
> calls. The problem is that (1) spice-server updates surfaces also
> without request from driver.

On worker->stop() for example, which renderes all outstanding commands
so all state is flushed to the surfaces (and thereby device memory).
This is done on vm_stop too, so I wouldn't be surprised if most surfaces
are dirtied anyway at this point.  Getting notifications about
spice-server touching surfaces doesn't buy us much then.

cheers,
  Gerd