tree c397de7bd3efb5dc92ba0feab1a5e0be2b325caa
parent f7bbe7883c3f119714fd09a8ceaac8075ba04dfe
author Chris Wilson <chris@chris-wilson.co.uk> 1471622068 +0100
committer Chris Wilson <chris@chris-wilson.co.uk> 1471623216 +0100

drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass

Very old numbers indicate this is a 66% improvement when remapping the
entire object for fence contention - due to the elimination of
track_pfn_insert and its strcmp.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Testcase: igt/gem_fence_upload/performance
Testcase: igt/gem_mmap_gtt
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160819155428.1670-6-chris@chris-wilson.co.uk