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drm/i915: First try a normal large kmalloc for the temporary exec buffers

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As we just need a temporary array whilst performing the relocations for
the execbuffer, first attempt to allocate using kmalloc even if it is
not of order page-0. This avoids the overhead of remapping the
discontiguous array and so gives a moderate boost to execution
throughput.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-02-21 12:54:48 +00:00
parent fca8740925
commit 8408c282f0
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -1306,7 +1306,11 @@ i915_gem_execbuffer2(struct drm_device *dev, void *data,
return -EINVAL;
}
exec2_list = drm_malloc_ab(sizeof(*exec2_list), args->buffer_count);
exec2_list = kmalloc(sizeof(*exec2_list)*args->buffer_count,
GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
if (exec2_list == NULL)
exec2_list = drm_malloc_ab(sizeof(*exec2_list),
args->buffer_count);
if (exec2_list == NULL) {
DRM_ERROR("Failed to allocate exec list for %d buffers\n",
args->buffer_count);