radeon: Add comment warning about not choosing critical debug level.

diff --git a/src/mesa/drivers/dri/radeon/radeon_debug.h b/src/mesa/drivers/dri/radeon/radeon_debug.h
index 681e34c2104130b2d92c6343e33b13210b90b7d5..2b35044fb66fb38f495afc59f04f750add00c0e1 100644 (file)
--- a/src/mesa/drivers/dri/radeon/radeon_debug.h
+++ b/src/mesa/drivers/dri/radeon/radeon_debug.h
@@ -43,6 +43,9 @@ typedef enum radeon_debug_levels {
 
 /**
  * Compile time option to change level of debugging compiled to dri driver.
+ * Selecting critical level is not recommended because perfromance gains are
+ * going to minimal but you will lose a lot of important warnings in case of
+ * errors.
  */
 #ifndef RADEON_DEBUG_LEVEL
 #define RADEON_DEBUG_LEVEL RADEON_VERBOSE