drm/ttm: Improved fencing of buffer object lists
Drastically reduce the number of spin lock / unlock operations by performing
unreserving and fencing under global locks.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jerome Glisse <j.glisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index d93c73b..551a5d3 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -299,14 +299,19 @@
return ret;
}
+void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo)
+{
+ ttm_bo_add_to_lru(bo);
+ atomic_set(&bo->reserved, 0);
+ wake_up_all(&bo->event_queue);
+}
+
void ttm_bo_unreserve(struct ttm_buffer_object *bo)
{
struct ttm_bo_global *glob = bo->glob;
spin_lock(&glob->lru_lock);
- ttm_bo_add_to_lru(bo);
- atomic_set(&bo->reserved, 0);
- wake_up_all(&bo->event_queue);
+ ttm_bo_unreserve_locked(bo);
spin_unlock(&glob->lru_lock);
}
EXPORT_SYMBOL(ttm_bo_unreserve);