From: Maurycy Pawłowski-Wieroński <maurycy@maurycy.com>
Date: Thu, 30 Apr 2026 21:18:07 +0000 (+0200)
Subject: gh-144319: Use transparent huge pages via `madvise(MADV_HUGEPAGE)` in pymalloc (... 
X-Git-Tag: v3.15.0b1~149
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=51107387797887b91f0dd69090a30c88a7997aac;p=thirdparty%2FPython%2Fcpython.git

gh-144319: Use transparent huge pages via `madvise(MADV_HUGEPAGE)` in pymalloc (#144353)
---

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