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

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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
This commit is contained in:
Chris Wilson 2016-08-19 16:54:28 +01:00
commit c58305af18
5 changed files with 99 additions and 45 deletions
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