[Spice-devel] [PATCH v2] qxl: don't render stuff when the vm is stopped.

[Alon Levy]

On Wed, Feb 15, 2012 at 06:28:53PM +0200, Alon Levy wrote:
> On Wed, Feb 15, 2012 at 03:45:30PM +0100, Gerd Hoffmann wrote:
> > This patch fixes the local qxl renderer to not kick spice-server
> > in case the vm is stopped.  First it is largely pointless because
> > we ask spice-server to process all not-yet processed commands when
> > the vm is stopped, so there isn't much do do anyway.  Second we
> > avoid triggering an assert in spice-server.
> > 
> > The patch makes sure we still honor redraw requests, even if we don't
> > ask spice-server for updates.  This is needed to handle displaysurface
> > changes with a stopped vm correctly.
> > 
> > With this patch applied it is possible to take screen shots (via
> > screendump monitor command) from a qxl gpu even in case the guest
> > is stopped.
> > 
> 
> ACK.

But please mention RHBZ 748810.

> 
> > Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
> > ---
> >  hw/qxl-render.c |   12 +++++-------
> >  1 files changed, 5 insertions(+), 7 deletions(-)
> > 
> > diff --git a/hw/qxl-render.c b/hw/qxl-render.c
> > index 133d093..7084143 100644
> > --- a/hw/qxl-render.c
> > +++ b/hw/qxl-render.c
> > @@ -121,19 +121,17 @@ void qxl_render_update(PCIQXLDevice *qxl)
> >          dpy_resize(vga->ds);
> >      }
> >  
> > -    if (!qxl->guest_primary.commands) {
> > -        return;
> > -    }
> > -    qxl->guest_primary.commands = 0;
> > -
> >      update.left   = 0;
> >      update.right  = qxl->guest_primary.surface.width;
> >      update.top    = 0;
> >      update.bottom = qxl->guest_primary.surface.height;
> >  
> >      memset(dirty, 0, sizeof(dirty));
> > -    qxl_spice_update_area(qxl, 0, &update,
> > -                          dirty, ARRAY_SIZE(dirty), 1, QXL_SYNC);
> > +    if (runstate_is_running() && qxl->guest_primary.commands) {
> > +        qxl->guest_primary.commands = 0;
> > +        qxl_spice_update_area(qxl, 0, &update,
> > +                              dirty, ARRAY_SIZE(dirty), 1, QXL_SYNC);
> > +    }
> >      if (redraw) {
> >          memset(dirty, 0, sizeof(dirty));
> >          dirty[0] = update;
> > -- 
> > 1.7.1
> > 
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