diff --git a/init/init.cpp b/init/init.cpp
index d5bdd12..038f172 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -795,6 +795,10 @@
         InstallRebootSignalHandlers();
     }
 
+    // No threads should be spin up until signalfd
+    // is registered. If the threads are indeed required,
+    // each of these threads _should_ make sure SIGCHLD signal
+    // is blocked. See b/223076262
     boot_clock::time_point start_time = boot_clock::now();
 
     trigger_shutdown = [](const std::string& command) { shutdown_state.TriggerShutdown(command); };