4 files changed, 41 insertions, 15 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index fa63f1b46103..c437f914d537 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1872,19 +1872,6 @@ extern struct dentry *mount_pseudo(struct file_system_type *, char *,
         const struct dentry_operations *dops,
         unsigned long);
 
-static inline void sb_mark_dirty(struct super_block *sb)
-{
-        sb->s_dirt = 1;
-}
-static inline void sb_mark_clean(struct super_block *sb)
-{
-        sb->s_dirt = 0;
-}
-static inline int sb_is_dirty(struct super_block *sb)
-{
-        return sb->s_dirt;
-}
-
 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
 #define fops_get(fops) \
         (((fops) && try_module_get((fops)->owner) ? (fops) : NULL))
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 5557baefed60..912c30a8ddb1 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -971,6 +971,10 @@ extern void __journal_clean_data_list(transaction_t *transaction);
 /* Log buffer allocation */
 extern struct journal_head * jbd2_journal_get_descriptor_buffer(journal_t *);
 int jbd2_journal_next_log_block(journal_t *, unsigned long long *);
+int jbd2_journal_get_log_tail(journal_t *journal, tid_t *tid,
+                              unsigned long *block);
+void __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block);
+void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block);
 
 /* Commit management */
 extern void jbd2_journal_commit_transaction(journal_t *);
@@ -1020,6 +1024,11 @@ jbd2_journal_write_metadata_buffer(transaction_t	  *transaction,
 /* Transaction locking */
 extern void             __wait_on_journal (journal_t *);
 
+/* Transaction cache support */
+extern void jbd2_journal_destroy_transaction_cache(void);
+extern int  jbd2_journal_init_transaction_cache(void);
+extern void jbd2_journal_free_transaction(transaction_t *);
+
 /*
  * Journal locking.
  *
@@ -1082,7 +1091,8 @@ extern int	   jbd2_journal_destroy    (journal_t *);
 extern int         jbd2_journal_recover    (journal_t *journal);
 extern int         jbd2_journal_wipe       (journal_t *, int);
 extern int         jbd2_journal_skip_recovery   (journal_t *);
-extern void        jbd2_journal_update_superblock       (journal_t *, int);
+extern void        jbd2_journal_update_sb_log_tail      (journal_t *, tid_t,
+                                unsigned long, int);
 extern void        __jbd2_journal_abort_hard    (journal_t *);
 extern void        jbd2_journal_abort      (journal_t *, int);
 extern int         jbd2_journal_errno      (journal_t *);
diff --git a/include/linux/journal-head.h b/include/linux/journal-head.h
index 423cb6d78ee0..c18b46f8aeeb 100644
--- a/include/linux/journal-head.h
+++ b/include/linux/journal-head.h
@@ -66,6 +66,8 @@ struct journal_head {
          * transaction (if there is one).  Only applies to buffers on a
          * transaction's data or metadata journaling list.
          * [j_list_lock] [jbd_lock_bh_state()]
+         * Either of these locks is enough for reading, both are needed for
+         * changes.
          */
         transaction_t *b_transaction;
 
diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h
index 75964412ddbb..127993dbf322 100644
--- a/include/trace/events/jbd2.h
+++ b/include/trace/events/jbd2.h
@@ -81,6 +81,13 @@ DEFINE_EVENT(jbd2_commit, jbd2_commit_logging,
         TP_ARGS(journal, commit_transaction)
 );
 
+DEFINE_EVENT(jbd2_commit, jbd2_drop_transaction,
+
+        TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
+
+        TP_ARGS(journal, commit_transaction)
+);
+
 TRACE_EVENT(jbd2_end_commit,
         TP_PROTO(journal_t *journal, transaction_t *commit_transaction),
 
@@ -200,7 +207,7 @@ TRACE_EVENT(jbd2_checkpoint_stats,
                   __entry->forced_to_close, __entry->written, __entry->dropped)
 );
 
-TRACE_EVENT(jbd2_cleanup_journal_tail,
+TRACE_EVENT(jbd2_update_log_tail,
 
         TP_PROTO(journal_t *journal, tid_t first_tid,
                  unsigned long block_nr, unsigned long freed),
@@ -229,6 +236,26 @@ TRACE_EVENT(jbd2_cleanup_journal_tail,
                   __entry->block_nr, __entry->freed)
 );
 
+TRACE_EVENT(jbd2_write_superblock,
+
+        TP_PROTO(journal_t *journal, int write_op),
+
+        TP_ARGS(journal, write_op),
+
+        TP_STRUCT__entry(
+                __field(        dev_t,  dev                     )
+                __field(          int,  write_op                )
+        ),
+
+        TP_fast_assign(
+                __entry->dev            = journal->j_fs_dev->bd_dev;
+                __entry->write_op       = write_op;
+        ),
+
+        TP_printk("dev %d,%d write_op %x", MAJOR(__entry->dev),
+                  MINOR(__entry->dev), __entry->write_op)
+);
+
 #endif /* _TRACE_JBD2_H */
 
 /* This part must be outside protection */