From 63677dde631e089c4dc00b6cca5e6e03ac9fdc90 Mon Sep 17 00:00:00 2001
From: David Goldblatt <davidgoldblatt@fb.com>
Date: Sat, 5 Dec 2020 09:10:15 -0800
Subject: [PATCH] Pages: Statically detect if pages_huge may succeed

---
 include/jemalloc/internal/pages.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/jemalloc/internal/pages.h b/include/jemalloc/internal/pages.h
index 7dae633a..cfaa0fc2 100644
--- a/include/jemalloc/internal/pages.h
+++ b/include/jemalloc/internal/pages.h
@@ -58,6 +58,18 @@ static const bool pages_can_purge_forced =
 #endif
     ;
 
+#if defined(JEMALLOC_HAVE_MADVISE_HUGE) || defined(JEMALLOC_HAVE_MEMCNTL)
+#  define PAGES_CAN_HUGIFY
+#endif
+
+static const bool pages_can_hugify =
+#ifdef PAGES_CAN_HUGIFY
+    true
+#else
+    false
+#endif
+    ;
+
 typedef enum {
 	thp_mode_default       = 0, /* Do not change hugepage settings. */
 	thp_mode_always        = 1, /* Always set MADV_HUGEPAGE. */