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drm/i915: use uncached writes in pwrite 

It's around 20% faster.

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-03-25 19:47:39 +02:00
parent ffc62976d2
commit 117babcdd5
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/i915/i915_gem.c
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@ -642,9 +642,9 @@ i915_gem_shmem_pwrite(struct drm_device *dev,
if (partial_cacheline_write)
drm_clflush_virt_range(vaddr + shmem_page_offset,
page_length);
ret = __copy_from_user_inatomic(vaddr + shmem_page_offset,
user_data,
page_length);
ret = __copy_from_user_inatomic_nocache(vaddr + shmem_page_offset,
user_data,
page_length);
if (needs_clflush_after)
drm_clflush_virt_range(vaddr + shmem_page_offset,
page_length);