1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index 346e2b80be7d..6384b19efe64 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -543,6 +543,11 @@ struct transaction_s
         unsigned long           t_expires;
 
         /*
+         * When this transaction started, in nanoseconds [no locking]
+         */
+        ktime_t                 t_start_time;
+
+        /*
          * How many handles used this transaction? [t_handle_lock]
          */
         int t_handle_count;
@@ -798,9 +803,19 @@ struct journal_s
         struct buffer_head      **j_wbuf;
         int                     j_wbufsize;
 
+        /*
+         * this is the pid of the last person to run a synchronous operation
+         * through the journal.
+         */
         pid_t                   j_last_sync_writer;
 
         /*
+         * the average amount of time in nanoseconds it takes to commit a
+         * transaction to the disk.  [j_state_lock]
+         */
+        u64                     j_average_commit_time;
+
+        /*
          * An opaque pointer to fs-private information.  ext3 puts its
          * superblock pointer here
          */