On Thu, Mar 06, 2014 at 01:12:30PM -0800, Kenneth Graunke wrote: > The first call to BEGIN_BATCH or BEGIN_BATCH_BLT will set current_batch > to RENDER_BATCH or BLT_BATCH. If it's zero, that means the batch is > empty, so there's no point in flushing. > > Previously, we would just go ahead and do a RENDER_RING flush, though > more by accident than intentional design.
It was intentional. One code path required us to emit an empty batch - except that we don't allow such and so had to emit a flush instead. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
