X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-registry.h;h=0cba8a334e54609df98d5e615662d68a73654c70;hb=445fe60d5571382fd203cfb4ab32030e29fc490b;hp=f195b7447b4122c8792ffa0302ffc3418349ab49;hpb=7a391832ea3d70a71e00b76398259c5aa7d18541;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/ust-registry.h b/src/bin/lttng-sessiond/ust-registry.h
index f195b7447..0cba8a334 100644
--- a/src/bin/lttng-sessiond/ust-registry.h
+++ b/src/bin/lttng-sessiond/ust-registry.h
@@ -33,8 +33,12 @@ struct ust_app;
 
 struct ust_registry_session {
 	/*
-	 * With multiple writers and readers, use this lock to access the registry.
-	 * Can nest within the ust app session lock.
+	 * With multiple writers and readers, use this lock to access
+	 * the registry. Can nest within the ust app session lock.
+	 * Also acts as a registry serialization lock. Used by registry
+	 * readers to serialize the registry information sent from the
+	 * sessiond to the consumerd.
+	 * The consumer socket lock nests within this lock.
 	 */
 	pthread_mutex_t lock;
 	/* Next channel ID available for a newly registered channel. */
@@ -63,11 +67,13 @@ struct ust_registry_session {
 	/* Length of bytes sent to the consumer. */
 	size_t metadata_len_sent;
 	/*
-	 * Hash table containing channels sent by the UST tracer. MUST be accessed
-	 * with a RCU read side lock acquired.
+	 * Hash table containing channels sent by the UST tracer. MUST
+	 * be accessed with a RCU read side lock acquired.
 	 */
 	struct lttng_ht *channels;
-	/* Unique key to identify the metadata on the consumer side. */
+	/*
+	 * Unique key to identify the metadata on the consumer side.
+	 */
 	uint64_t metadata_key;
 	/*
 	 * Indicates if the metadata is closed on the consumer side. This is to