[Intel-gfx] [PATCH] drm/i915: Tighten obj->map_and_fenceable

[Chris Wilson]

On Fri, Feb 27, 2015 at 04:32:26PM +0100, Daniel Vetter wrote:
> On Fri, Feb 27, 2015 at 01:58:43PM +0000, Chris Wilson wrote:
> > For an object right on the boundary of mappable space, as the fenceable
> > size is stricly greater than the actual size, its fence region may extend
> > out of mappable space.
> > 
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> 
> Do you have a scenario where this could blow up? Given the pot alignment
> and fence_size constraints these two should still be equivalent.

It could only concievably impact PNV (the only system where we have non-mappable
and fence_size > obj.base.size), and the alignment there is always the
fence size as well which would prevent the overlap.

> Ack if I do an s/tighten/clarify/ and amend your commit message?
Ok.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre