X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-context-vppid.c;h=06377a3098ff7f72b992f0c9848f693fbc10f7dc;hb=79b18ef7332e6f75826f9b0e568b47394e98b127;hp=365d97394e89c98094b43dacc5918ee353271c00;hpb=de544ea58e0231054bb62e2c814c662b894d6e25;p=lttng-modules.git

diff --git a/lttng-context-vppid.c b/lttng-context-vppid.c
index 365d9739..06377a30 100644
--- a/lttng-context-vppid.c
+++ b/lttng-context-vppid.c
@@ -51,6 +51,15 @@ void vppid_record(struct lttng_ctx_field *field,
 	 * current nsproxy can be NULL when scheduled out of exit. pid_vnr uses
 	 * the current thread nsproxy to perform the lookup.
 	 */
+
+	/*
+	 * TODO: when we eventually add RCU subsystem instrumentation,
+	 * taking the rcu read lock here will trigger RCU tracing
+	 * recursively. We should modify the kernel synchronization so
+	 * it synchronizes both for RCU and RCU sched, and rely on
+	 * rcu_read_lock_sched_notrace.
+	 */
+
 	rcu_read_lock();
 	parent = rcu_dereference(current->real_parent);
 	if (!current->nsproxy)