pythongh-132519: fix excessive mem usage in QSBR with large blocks

tom-pytel · tom-pytel · commit d29dc7c80e58 · 2025-04-14T11:19:57.000-04:00
diff --git a/Python/ceval_gil.c b/Python/ceval_gil.c
@@ -1350,6 +1350,9 @@ _Py_HandlePending(PyThreadState *tstate)
         _Py_unset_eval_breaker_bit(tstate, _PY_EVAL_EXPLICIT_MERGE_BIT);
         _Py_brc_merge_refcounts(tstate);
     }
+
+    /* Keep memory usage down if QSBR freeing large blocks. */
+    _PyMem_ProcessDelayed(tstate);
 #endif
 
     /* GC scheduled to run */

Original file line number	Diff line number	Diff line change
`@@ -1350,6 +1350,9 @@ _Py_HandlePending(PyThreadState *tstate)`
`1350`	`1350`	`_Py_unset_eval_breaker_bit(tstate, _PY_EVAL_EXPLICIT_MERGE_BIT);`
`1351`	`1351`	`_Py_brc_merge_refcounts(tstate);`
`1352`	`1352`	`}`
	`1353`	`+`
	`1354`	`+ /* Keep memory usage down if QSBR freeing large blocks. */`
	`1355`	`+ _PyMem_ProcessDelayed(tstate);`
`1353`	`1356`	`#endif`
`1354`	`1357`
`1355`	`1358`	`/* GC scheduled to run */`