vere: add comment noting possible ctrl-z deadlock
@@ -633,6 +633,9 @@ u3_disk_exit(u3_disk* log_u)
// cancel write thread
//
+ // XX can deadlock when called from signal handler
+ // XX revise SIGTSTP handling
+ //
if ( c3y == log_u->ted_o ) {
c3_i sas_i;
