[Intel-gfx] [PATCH 10/15] drm/i915: First try the previous execbuffer location

[Joonas Lahtinen]

On to, 2017-03-16 at 13:20 +0000, Chris Wilson wrote:
> When choosing a slot for an execbuffer, we ideally want to use the same
> address as last time (so that we don't have to rebind it) and the same
> address as expected by the user (so that we don't have to fixup any
> relocations pointing to it). If we first try to bind the incoming
> execbuffer->offset from the user, or the currently bound offset that
> should hopefully achieve the goal of avoiding the rebind cost and the
> relocation penalty. However, if the object is not currently bound there
> we don't want to arbitrarily unbind an object in our chosen position and
> so choose to rebind/relocate the incoming object instead. After we
> report the new position back to the user, on the next pass the
> relocations should have settled down.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Joonas Lahtinen <joonas.lahtien at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation