[3.9] bpo-40514: Remove --with-experimental-isolated-subinterpreters in 3.9 (GH-20228)

Remove --with-experimental-isolated-subinterpreters configure option
in Python 3.9: the experiment continues in the master branch, but
it's no longer needed in 3.9.

2 files changed, 0 insertions, 23 deletions

diff --git a/Modules/_xxsubinterpretersmodule.c b/Modules/_xxsubinterpretersmodule.c
index 8a6fce9..de11c09 100644
--- a/Modules/_xxsubinterpretersmodule.c
+++ b/Modules/_xxsubinterpretersmodule.c
@@ -1939,20 +1939,6 @@ _run_script_in_interpreter(PyInterpreterState *interp, const char *codestr,
         return -1;
     }
 
-#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-    // Switch to interpreter.
-    PyThreadState *new_tstate = PyInterpreterState_ThreadHead(interp);
-    PyThreadState *save1 = PyEval_SaveThread();
-
-    (void)PyThreadState_Swap(new_tstate);
-
-    // Run the script.
-    _sharedexception *exc = NULL;
-    int result = _run_script(interp, codestr, shared, &exc);
-
-    // Switch back.
-    PyEval_RestoreThread(save1);
-#else
     // Switch to interpreter.
     PyThreadState *save_tstate = NULL;
     if (interp != PyInterpreterState_Get()) {
@@ -1970,7 +1956,6 @@ _run_script_in_interpreter(PyInterpreterState *interp, const char *codestr,
     if (save_tstate != NULL) {
         PyThreadState_Swap(save_tstate);
     }
-#endif
 
     // Propagate any exception out to the caller.
     if (exc != NULL) {
diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index a44752b..56dcb10 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -1181,14 +1181,6 @@ collect(PyThreadState *tstate, int generation,
     _PyTime_t t1 = 0;   /* initialize to prevent a compiler warning */
     GCState *gcstate = &tstate->interp->gc;
 
-#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-    if (tstate->interp->config._isolated_interpreter) {
-        // bpo-40533: The garbage collector must not be run on parallel on
-        // Python objects shared by multiple interpreters.
-        return 0;
-    }
-#endif
-
     if (gcstate->debug & DEBUG_STATS) {
         PySys_WriteStderr("gc: collecting generation %d...\n", generation);
         show_stats_each_generations(gcstate);