From 51107387797887b91f0dd69090a30c88a7997aac Mon Sep 17 00:00:00 2001
From: =?utf8?q?Maurycy=20Paw=C5=82owski-Wiero=C5=84ski?=
 <maurycy@maurycy.com>
Date: Thu, 30 Apr 2026 23:18:07 +0200
Subject: [PATCH] gh-144319: Use transparent huge pages via
 `madvise(MADV_HUGEPAGE)` in pymalloc (#144353)

---
 Objects/obmalloc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index e2d5b012955c..1809bd304513 100644
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -665,6 +665,9 @@ _PyMem_ArenaAlloc(void *Py_UNUSED(ctx), size_t size)
     if (ptr == MAP_FAILED)
         return NULL;
     assert(ptr != NULL);
+#ifdef MADV_HUGEPAGE
+    (void)madvise(ptr, size, MADV_HUGEPAGE);
+#endif
     (void)_PyAnnotateMemoryMap(ptr, size, "cpython:pymalloc");
     return ptr;
 #else
-- 
2.47.3