From 89535a32726450a92fa134cb32d82f0362c9877b Mon Sep 17 00:00:00 2001
From: Alex Mikheev <alexm@mellanox.com>
Date: Thu, 18 Sep 2014 10:04:44 +0300
Subject: [PATCH] OSHMEM: sshmem mmap: use MAP_PRIVATE instead of MAP_SHARED

It looks like using MAP_PRIVATE instead of MAP_SHARED greatly
speeds up infiniband memory registration.

Change-Id: Id7089f58458ef8fff4034a2c4707d31f7e8b6694
---
 oshmem/mca/sshmem/mmap/sshmem_mmap_module.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c b/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c
index 070470de5b..6120bb0bac 100644
--- a/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c
+++ b/oshmem/mca/sshmem/mmap/sshmem_mmap_module.c
@@ -185,7 +185,7 @@ segment_create(map_segment_t *ds_buf,
     addr = mmap((void *)mca_sshmem_base_start_address,
                 size,
                 PROT_READ | PROT_WRITE,
-                MAP_SHARED |
+                MAP_PRIVATE |
 #if defined(MAP_ANONYMOUS)
                 MAP_ANONYMOUS |
 #endif