-#define DEFAULT_CHANNEL_NAME "channel0"
-#define DEFAULT_CHANNEL_OVERWRITE 0
-#define DEFAULT_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
-#define DEFAULT_CHANNEL_SUBBUF_NUM 8 /* Must always be a power of 2 */
-#define DEFAULT_CHANNEL_SWITCH_TIMER 0 /* usec */
-#define DEFAULT_CHANNEL_READ_TIMER 200 /* usec */
+#define DEFAULT_CHANNEL_NAME "channel0"
+#define DEFAULT_CHANNEL_OVERWRITE 0 /* usec */
+/* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
+#define DEFAULT_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
+/* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */
+#define DEFAULT_CHANNEL_SUBBUF_NUM 8
+#define DEFAULT_CHANNEL_SWITCH_TIMER 0 /* usec */
+#define DEFAULT_CHANNEL_READ_TIMER 200 /* usec */
+/* See lttng-kernel.h enum lttng_kernel_output for channel output */
+#define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
+
+/* == NOT IMPLEMENTED ==
+#define DEFAULT_UST_CHANNEL_OUTPUT LTTNG_UST_MMAP
+*/