From: Anatoly Burakov <anatoly.burakov@intel.com>
Date: Fri, 13 Jul 2018 12:48:00 +0000 (+0100)
Subject: eal: support --no-shconf in hugepage data file
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=cb14962a00e10411694682980d11e3f916e8e8c3;p=dpdk.git

eal: support --no-shconf in hugepage data file

Do not create a shared hugepage data file if we were asked to
not create any shared files.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5d3c8831bb..ddfa8b133a 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -521,7 +521,18 @@ static void *
 create_shared_memory(const char *filename, const size_t mem_size)
 {
 	void *retval;
-	int fd = open(filename, O_CREAT | O_RDWR, 0666);
+	int fd;
+
+	/* if no shared files mode is used, create anonymous memory instead */
+	if (internal_config.no_shconf) {
+		retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE,
+				MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+		if (retval == MAP_FAILED)
+			return NULL;
+		return retval;
+	}
+
+	fd = open(filename, O_CREAT | O_RDWR, 0666);
 	if (fd < 0)
 		return NULL;
 	if (ftruncate(fd, mem_size) < 0) {