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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/ext4/fsync.c
parent23f8b79eae8a74e42a006ffa7c456e295c7e1c0d (diff)
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/ext4/fsync.c')
-rw-r--r--fs/ext4/fsync.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index c37d1e86f51..5afe4370840 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -28,6 +28,7 @@
#include <linux/writeback.h>
#include <linux/jbd2.h>
#include <linux/blkdev.h>
+#include <linux/marker.h>
#include "ext4.h"
#include "ext4_jbd2.h"
@@ -51,6 +52,10 @@ int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync)
J_ASSERT(ext4_journal_current_handle() == NULL);
+ trace_mark(ext4_sync_file, "dev %s datasync %d ino %ld parent %ld",
+ inode->i_sb->s_id, datasync, inode->i_ino,
+ dentry->d_parent->d_inode->i_ino);
+
/*
* data=writeback:
* The caller's filemap_fdatawrite()/wait will sync the data.