GFS2: Add some useful messages
The following patch adds a message to indicate when barriers have been
disabled due to a block device which doesn't support them. You could
already tell this via the mount options in /proc/mounts, but all the
other filesystems also log a message at the same time.
Also, the same mechanisms are used to indicate when the lock
demote interface has been used (only ever used for debugging)
which is a request from our support team.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 2ac845d..7afb62e 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -233,6 +233,8 @@
glops = gfs2_glops_list[gltype];
if (glops == NULL)
return -EINVAL;
+ if (test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
+ fs_info(sdp, "demote interface used\n");
rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
if (rv)
return rv;