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2019-01-31scripts: add render_block_graph function for QEMUMachineVladimir Sementsov-Ogievskiy
Render block nodes graph with help of graphviz. This new function is for debugging, so there is no sense to put it into qemu.py as a method of QEMUMachine. Let's instead put it separately. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Acked-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20181221170909.25584-3-vsementsov@virtuozzo.com Signed-off-by: Max Reitz <mreitz@redhat.com>