[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] qemu-dm performance
> >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. Attachment:
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