f Add comment on internal_runtime

Author: tnull

src/io/vss_store.rs

@@ -54,6 +54,12 @@ pub struct VssStore {
 	// operations aren't sensitive to the order of execution.
 	next_version: AtomicU64,
 	runtime: Arc<Runtime>,
+	// A VSS-internal runtime we use to avoid any deadlocks we could hit when waiting on a spawned
+	// blocking task to finish while the blocked thread had acquired the reactor. In particular,
+	// this works around a previously-hit case where a concurrent call to
+	// `PeerManager::process_pending_events` -> `ChannelManager::get_and_clear_pending_msg_events`
+	// would deadlock when trying to acquire sync `Mutex` locks that are held by the thread
+	// currently being blocked waiting on the VSS operation to finish.
 	internal_runtime: Option<tokio::runtime::Runtime>,
 }