ocfs2 patch to track delayed orphan scan timer statistics
Patch to track delayed orphan scan timer statistics.
Modifies ocfs2_osb_dump to print the following:
Orphan Scan=> Local: 10 Global: 21 Last Scan: 67 seconds ago
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 44ed768..4a3b9e6 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1900,6 +1900,8 @@
* number and update LVB so other node will skip the scan for a while
*/
seqno++;
+ os->os_count++;
+ os->os_scantime = CURRENT_TIME;
unlock:
ocfs2_orphan_scan_unlock(osb, seqno, DLM_LOCK_EX);
out:
@@ -1939,6 +1941,8 @@
os = &osb->osb_orphan_scan;
os->os_osb = osb;
+ os->os_count = 0;
+ os->os_scantime = CURRENT_TIME;
mutex_init(&os->os_lock);
INIT_DELAYED_WORK(&os->os_orphan_scan_work,
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 1fde52c..ab285be 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -156,7 +156,9 @@
struct ocfs2_super *os_osb;
struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
struct delayed_work os_orphan_scan_work;
- u32 os_seqno; /* incremented on every scan */
+ struct timespec os_scantime; /* time this node ran the scan */
+ u32 os_count; /* tracks node specific scans */
+ u32 os_seqno; /* tracks cluster wide scans */
};
struct ocfs2_dlm_debug {
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 44ac27e..d05f3ca 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -208,6 +208,7 @@
int i;
struct ocfs2_cluster_connection *cconn = osb->cconn;
struct ocfs2_recovery_map *rm = osb->recovery_map;
+ struct ocfs2_orphan_scan *os;
out += snprintf(buf + out, len - out,
"%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
@@ -309,6 +310,13 @@
i, osb->slot_recovery_generations[i]);
}
+ os = &osb->osb_orphan_scan;
+ out += snprintf(buf + out, len - out, "Orphan Scan=> ");
+ out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
+ os->os_count, os->os_seqno);
+ out += snprintf(buf + out, len - out, " Last Scan: %lu seconds ago\n",
+ (get_seconds() - os->os_scantime.tv_sec));
+
return out;
}
