From: Rasmus Lerdorf <rasmus@lerdorf.com>
Date: Tue, 22 Mar 2016 15:04:53 +0000 (-0700)
Subject: Disable huge pages in the Zend allocator by default
X-Git-Tag: php-7.0.5~9
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=06c2b318665238dca8d168dab3913d073564ef78;p=php

Disable huge pages in the Zend allocator by default
As per the discussion on internals, this is an expert feature
that needs special system-level configuration and care.
---

diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index 4cf1178c57..1876559317 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -201,7 +201,7 @@ typedef struct  _zend_mm_huge_list zend_mm_huge_list;
 #endif
 
 #ifdef MAP_HUGETLB
-int zend_mm_use_huge_pages = 1;
+int zend_mm_use_huge_pages = 0;
 #endif
 
 /*
@@ -2654,8 +2654,8 @@ static void alloc_globals_ctor(zend_alloc_globals *alloc_globals)
 #endif
 #ifdef MAP_HUGETLB
 	tmp = getenv("USE_ZEND_ALLOC_HUGE_PAGES");
-	if (tmp && !zend_atoi(tmp, 0)) {
-		zend_mm_use_huge_pages = 0;
+	if (tmp && zend_atoi(tmp, 0)) {
+		zend_mm_use_huge_pages = 1;
 	}
 #endif
 	ZEND_TSRMLS_CACHE_UPDATE();