rt: Make linked failure less prone to deadlock

Still a mess.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/rt/rust_port.cpp b/src/rt/rust_port.cpp
index 41884f8f60c..bbfa737adec 100644
--- a/src/rt/rust_port.cpp
+++ b/src/rt/rust_port.cpp
@@ -88,6 +88,11 @@ void rust_port::receive(void *dptr, uintptr_t *yield) {
     task->rendezvous_ptr = (uintptr_t*) dptr;
     task->block(this, "waiting for rendezvous data");
 
+    // Blocking the task might fail if the task has already been killed, but
+    // in the event of both failure and success the task needs to yield. On
+    // success, it yields and waits to be unblocked. On failure it yields and
+    // is then fails the task.
+
     *yield = true;
 }