[Intel-gfx] [PATCH] drm/i915: Pin relocations for the duration of constructing the execbuffer

[Chris Wilson]

On Tue, Nov 26, 2013 at 11:23:15AM +0000, Chris Wilson wrote:
> As the execbuffer dispatch grows ever more complex and involves multiple
> stages of moving objects into the aperture, we need to take greater care
> that we do not evict our execbuffer objects prior to dispatch. This is
> relatively simple as we can just keep the objects pinned for not just
> the relocation but until we are finished.

One such example is the possibility of the context switch causing an
eviction or hitting the shrinker in order to fit its object into the
aperture.

Link: http://lists.freedesktop.org/archives/intel-gfx/2013-November/036166.html
Reported-by: "Siluvery, Arun" <arun.siluvery at intel.com>

> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Ben Widawsky <benjamin.widawsky at intel.com>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Cc: stable at vger.kernel.org

-- 
Chris Wilson, Intel Open Source Technology Centre