From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 21 Feb 2011 12:54:48 +0000 (+0000)
Subject: drm/i915: First try a normal large kmalloc for the temporary exec buffers
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8408c282f0cf34ee166df5f842f2861d245407fd;p=linux.git

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

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>
---

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index a72e7b2cb0481..f0c93b2e6c687 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -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);