-#define PRIO_SD_VOLUME_LIST 20
-#define PRIO_SD_DEV_ACCESS 15
-#define PRIO_SD_DEV_SPOOL 14
-#define PRIO_SD_DEV_ACQUIRE 13
+#define PRIO_SD_DEV_ACQUIRE 4 /* dev.acquire_mutex */
+#define PRIO_SD_DEV_ACCESS 5 /* dev.m_mutex */
+#define PRIO_SD_VOL_LIST 10 /* vol_list_lock */
+#define PRIO_SD_READ_VOL_LIST 12 /* read_vol_list */
+#define PRIO_SD_DEV_SPOOL 14 /* dev.spool_mutex */