> >Deleting this function should result in a blank VGA screen for your HVM
> guest,
>
> I not sure why but I'm not seeing this. Here is what how I commented
> out vram_dirty (as shown in gdb):
>
> 1563 for (y = 0; y < s->vram_size; y += TARGET_PAGE_SIZE){
> 1564 /*if (vram_dirty(s, y, TARGET_PAGE_SIZE))
> 1565 cpu_physical_memory_set_dirty(s->vram_offset + y);
> */
> 1566 }
It turns out that there was a bug a little later on which meant that
the dirty bits were never actually cleared. Fixing this seems to have
fairly drastically reduced qemu overhead. The fix is now present in
xen-unstable.
Thanks,
Steven.

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