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-rw-r--r--src/malloc/mallocng/free.c2
-rw-r--r--src/malloc/mallocng/glue.h2
2 files changed, 3 insertions, 1 deletions
diff --git a/src/malloc/mallocng/free.c b/src/malloc/mallocng/free.c
index 418a085c..43f32aad 100644
--- a/src/malloc/mallocng/free.c
+++ b/src/malloc/mallocng/free.c
@@ -119,7 +119,7 @@ void free(void *p)
if (((uintptr_t)(start-1) ^ (uintptr_t)end) >= 2*PGSZ && g->last_idx) {
unsigned char *base = start + (-(uintptr_t)start & (PGSZ-1));
size_t len = (end-base) & -PGSZ;
- if (len) {
+ if (len && USE_MADV_FREE) {
int e = errno;
madvise(base, len, MADV_FREE);
errno = e;
diff --git a/src/malloc/mallocng/glue.h b/src/malloc/mallocng/glue.h
index 151c48b8..77f4c812 100644
--- a/src/malloc/mallocng/glue.h
+++ b/src/malloc/mallocng/glue.h
@@ -24,6 +24,8 @@
#define realloc __libc_realloc
#define free __libc_free
+#define USE_MADV_FREE 0
+
#if USE_REAL_ASSERT
#include <assert.h>
#else