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authorSunil Mushran <sunil.mushran@oracle.com>2011-07-24 10:31:54 -0700
committerSunil Mushran <sunil.mushran@oracle.com>2011-07-24 10:31:54 -0700
commitbb570a5d9e74f71d32751823052db4a97d6a5e7c (patch)
treef8690b945d29e88d67bc55cd32656de73e13941d /fs/ocfs2
parenta2c0cc1579176bd0808ef7deea456767dfa80217 (diff)
downloadlinux-bb570a5d9e74f71d32751823052db4a97d6a5e7c.tar.bz2
ocfs2/cluster: Fix output in file elapsed_time_in_ms
The o2hb debugfs file, elapsed_time_in_ms, should return values only after the timer is armed atleast once. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/cluster/heartbeat.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 4728a746281d..a4e855e3690e 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1198,6 +1198,7 @@ static int o2hb_debug_open(struct inode *inode, struct file *file)
struct o2hb_debug_buf *db = inode->i_private;
struct o2hb_region *reg;
unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)];
+ unsigned long lts;
char *buf = NULL;
int i = -1;
int out = 0;
@@ -1234,9 +1235,11 @@ static int o2hb_debug_open(struct inode *inode, struct file *file)
case O2HB_DB_TYPE_REGION_ELAPSED_TIME:
reg = (struct o2hb_region *)db->db_data;
- out += snprintf(buf + out, PAGE_SIZE - out, "%u\n",
- jiffies_to_msecs(jiffies -
- reg->hr_last_timeout_start));
+ lts = reg->hr_last_timeout_start;
+ /* If 0, it has never been set before */
+ if (lts)
+ lts = jiffies_to_msecs(jiffies - lts);
+ out += snprintf(buf + out, PAGE_SIZE - out, "%lu\n", lts);
goto done;
case O2HB_DB_TYPE_REGION_PINNED: