prov/shm: Print shm name and error code when failed to open

This help debugging issues when the two sides don't agree on the naming convention. For example, in fabtests, if one side forgets to use the '-s <node-name>' option, shm objects it creates may lack the node-name prefix, while the peer may try to open with the prefix. Cherry-picked from commit a955a51 Signed-off-by: Jianxin Xiong <[email protected]>
ofiwg · Mar 18, 2024 · 9bc355c · 9bc355c
1 parent b8849e9
commit 9bc355c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/prov/shm/src/smr_util.c b/prov/shm/src/smr_util.c
@@ -408,7 +408,8 @@ int smr_map_to_region(const struct fi_provider *prov, struct smr_map *map,
 
 	fd = shm_open(name, O_RDWR, S_IRUSR | S_IWUSR);
 	if (fd < 0) {
-		FI_WARN_ONCE(prov, FI_LOG_AV, "shm_open error\n");
+		FI_WARN_ONCE(prov, FI_LOG_AV,
+			     "shm_open error: name %s errno %d\n", name, errno);
 		return -errno;
 	}