From f424f5b774b7cb0fd7939d28e68db6fa977baea1 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.i.king@gmail.com>
Date: Mon, 21 Nov 2022 12:45:11 +0000
Subject: [PATCH 2/3] stress-shm: skip stressor if /dev/shm is not mounted with
tmpfs on linux
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
stress-shm.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/stress-shm.c b/stress-shm.c
index 91bcd961aeb1..4e6327ac97d4 100644
--- a/stress-shm.c
+++ b/stress-shm.c
@@ -122,6 +122,18 @@ static int stress_shm_posix_child(
const size_t page_size = args->page_size;
struct sigaction sa;
+#if defined(__linux__)
+ /*
+ * /dev/shm should be mounted with tmpfs and
+ * be writeable, if not shm_open will fail
+ */
+ if (access("/dev/shm", W_OK) < 0) {
+ pr_inf("%s: cannot access /dev/shm for writes, errno=%d (%s) skipping stressor\n",
+ args->name, errno, strerror(errno));
+ return EXIT_NO_RESOURCE;
+ }
+#endif
+
addrs = calloc(shm_posix_objects, sizeof(*addrs));
if (!addrs) {
pr_fail("%s: calloc on addrs failed, out of memory\n", args->name);
--
2.38.1