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authorTheodore Ts'o <tytso@mit.edu>2008-10-05 20:50:06 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-05 20:50:06 -0400
commitede86cc473defab74d778aeac14b19f43129d4d1 (patch)
tree19da8009accf1737171f5949413e46a9086d5fdc /fs/jbd2/checkpoint.c
parent23f8b79eae8a74e42a006ffa7c456e295c7e1c0d (diff)
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ext4: Add debugging markers that can be used by systemtap
This debugging markers are designed to debug problems such as the random filesystem latency problems reported by Arjan. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/checkpoint.c')
-rw-r--r--fs/jbd2/checkpoint.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index af4651bf357..42895d36945 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -20,6 +20,7 @@
#include <linux/time.h>
#include <linux/fs.h>
#include <linux/jbd2.h>
+#include <linux/marker.h>
#include <linux/errno.h>
#include <linux/slab.h>
@@ -328,6 +329,8 @@ int jbd2_log_do_checkpoint(journal_t *journal)
* journal straight away.
*/
result = jbd2_cleanup_journal_tail(journal);
+ trace_mark(jbd2_checkpoint, "dev %s need_checkpoint %d",
+ journal->j_devname, result);
jbd_debug(1, "cleanup_journal_tail returned %d\n", result);
if (result <= 0)
return result;