1 files changed, 2 insertions, 0 deletions

diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 25fd3f1966f1..8cdca43016b2 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -117,6 +117,8 @@ static void alloc_mem(void **dst, void **src, size_t length)
         *src = zalloc(length);
         if (!*src)
                 die("memory allocation failed - maybe length is too large?\n");
+        /* Make sure to always replace the zero pages even if MMAP_THRESH is crossed */
+        memset(*src, 0, length);
 }
 
 static u64 do_memcpy_cycle(memcpy_t fn, size_t len, bool prefault)