drm/i915/execlists: Request the kernel context be pinned high
authorChris Wilson <chris@chris-wilson.co.uk>
Sun, 18 Dec 2016 15:37:23 +0000 (15:37 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Sun, 18 Dec 2016 16:18:55 +0000 (16:18 +0000)
commit2947e4080f22b63b46dbbb95e838396b58a9914b
tree00a5942f0ab1ae4713ec788bf9535152a9477894
parent70ffe9956c5cf328380053c803b783df711e8024
drm/i915/execlists: Request the kernel context be pinned high

PIN_HIGH is an expensive operation (in comparison to allocating from the
hole stack) unsuitable for frequent use (such as switching between
contexts). However, the kernel context should be pinned just once for
the lifetime of the driver, and here it is appropriate to keep it out of
the mappable range (in order to maximise mappable space for users).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161218153724.8439-6-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/intel_lrc.c