[Intel-gfx] [PATCH] drm/i915: Do an initial lockless wait for render completion before pread/pwrite

[Chris Wilson]

On Sun, 16 Dec 2012 17:51:55 +0000, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> Before performing the domain transition for pread/pwrite, and so a locked
> completion if still required, wait for any pending rendering locklessly.
> This should reduce contention when reading back results from the GPU, for
> example.

Meh, the pwrite side messes around with the ret=-EFAULT and so screws up
the shmem_write patch.
-Chris
> 

-- 
Chris Wilson, Intel Open Source Technology Centre