Chris Wilson 1e9a3acfd4 igt/gem_busy: Discard the indirect batchbuffers
The stack of batchbuffers is myth. In general there are only 2 levels of
stack for HEAD (ringbuffer, batchbuffer) and chaining up the batch
buffer just updates the lowest level of the stack. A BATCH_BUFFER_END at
any depth then returns to the ring.

So be creative and modify the batch buffer on the fly...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2016-04-22 19:31:06 +01:00
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