From ce6bd79bb93561136cef5e535817f22bfa5b9206 Mon Sep 17 00:00:00 2001
From: Kumar Aditya <kumaraditya@python.org>
Date: Wed, 16 Oct 2024 06:56:23 +0000
Subject: [PATCH] minor fixes

---
 Modules/_testcapimodule.c | 1 +
 Python/ceval_gil.c        | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index eb01566e3466715..7fe3e381c623df8 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -861,6 +861,7 @@ pending_threadfunc(PyObject *self, PyObject *arg, PyObject *kwargs)
     unsigned int num_added = 0;
     for (; num_added < num; num_added++) {
         if (Py_AddPendingCall(&_pending_callback, callable) < 0) {
+            // out of memory and freelist is empty
             break;
         }
     }
diff --git a/Python/ceval_gil.c b/Python/ceval_gil.c
index b148e9e05557a7a..36aba5fcf1762aa 100644
--- a/Python/ceval_gil.c
+++ b/Python/ceval_gil.c
@@ -1085,6 +1085,8 @@ Py_MakePendingCalls(void)
 void
 _PyEval_InitState(PyInterpreterState *interp)
 {
+    // Fill the pending freelist so that signal handlers can safely
+    // add pending calls without needing to allocate memory.
     struct _pending_calls *pending = &interp->ceval.pending;
     PyMutex_Lock(&pending->mutex);
     fill_pending_freelist(pending);