This has the potential to make brw_bo_busy a bit cheaper for internal
BOs if someone has checked it for busy or waited on it before. We
already do the same thing in brw_bo_wait.
---
src/mesa/drivers/dri/i965/brw_bufmgr.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_bufmgr.c
b/src/mesa/drivers/dri/i965/brw_bufmgr.c
index 7ac3bcad3da..58bb559fdee 100644
--- a/src/mesa/drivers/dri/i965/brw_bufmgr.c
+++ b/src/mesa/drivers/dri/i965/brw_bufmgr.c
@@ -448,6 +448,11 @@ int
brw_bo_busy(struct brw_bo *bo)
{
struct brw_bufmgr *bufmgr = bo->bufmgr;
+
+ /* If we know it's idle, don't bother with the kernel round trip */
+ if (bo->idle && !bo->external)
+ return false;
+
struct drm_i915_gem_busy busy = { .handle = bo->gem_handle };
int ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
--
2.17.1
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