[Intel-gfx] [PATCH 05/13] drm/i915: Insert a flush between batches if the breadcrumb was dropped

[Daniel Vetter]

On Fri, Jul 13, 2012 at 02:14:08PM +0100, Chris Wilson wrote:
> If we drop the breadcrumb request after a batch due to a signal for
> example we aim to fix it up at the next opportunity. In this case we
> emit a second batchbuffer with no waits upon the first and so no
> opportunity to insert the missing request, so we need to emit the
> missing flush for coherency. (Note that that invalidating the render
> cache is the same as flushing it, so there should have been no
> observable corruption.)
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Ok, now that I've got some more clue about how this all blows up, I've
merged this patch here (with a rather decently pimped commit message).
Thanks for digging into this & feeding me the lacking clue.

Cheers, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48