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| author | Dave Gordon <david.s.gordon@intel.com> | 2016-05-20 11:54:05 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-05-20 13:42:58 +0100 |
| commit | b338fa473e16c9be208b0aec7ec4e710a8a5f9ee (patch) | |
| tree | 8cdc229b0e33bce2666ade24589ca48d53611bd6 /drivers/gpu/drm/i915/i915_gem_userptr.c | |
| parent | dd6034c67a50a4f6895e5bded512e0dd4bf58918 (diff) | |
| download | linux-b338fa473e16c9be208b0aec7ec4e710a8a5f9ee.tar.gz linux-b338fa473e16c9be208b0aec7ec4e710a8a5f9ee.tar.bz2 linux-b338fa473e16c9be208b0aec7ec4e710a8a5f9ee.zip | |
drm/i915: optimise i915_gem_object_map() for small objects
We're using this function for ringbuffers and other "small" objects, so
it's worth avoiding an extra malloc()/free() cycle if the page array is
small enough to put on the stack. Here we've chosen an arbitrary cutoff
of 32 (4k) pages, which is big enough for a ringbuffer (4 pages) or a
context image (currently up to 22 pages).
v5:
change name of local array [Chris Wilson]
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1463741647-15666-3-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_userptr.c')
0 files changed, 0 insertions, 0 deletions