linux-ext4 - [PATCH][RESEND]tracepoint: add drop_transaction/update_superblock

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Date:	Thu, 12 Jan 2012 15:58:51 -0500
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	"tytso@....edu" <tytso@....edu>
CC:	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Lukas Czerner <lczerner@...hat.com>,
	"jack@...e.cz" <jack@...e.cz>,
	Satoru Moriya <satoru.moriya@....com>
Subject: [PATCH][RESEND]tracepoint: add
 drop_transaction/update_superblock_end to jbd2

Hello Ted,

Please review this patch adding jbd2 tracepoints(and hopefully apply to your tree).
This has already been accepted by Lukas and Jan.

Seiji

---
This patch adds trace_jbd2_drop_transaction and 
trace_jbd2_update_superblock_end because there are similar tracepoints in jbd and 
they are needed in jbd2 as well.


 Signed-off-by: Seiji Aguchi <seiji.aguchi@....com>
 Reviewed-by: Lukas Czerner <lczerner@...hat.com>
 Acked-by: Jan Kara <jack@...e.cz>

---
 fs/jbd2/checkpoint.c        |    2 ++
 fs/jbd2/journal.c           |    2 ++
 include/trace/events/jbd2.h |   28 ++++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 16a698b..2bfd8b0 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -797,5 +797,7 @@ void __jbd2_journal_drop_transaction(journal_t *journal, transaction_t *transact
 	J_ASSERT(journal->j_committing_transaction != transaction);
 	J_ASSERT(journal->j_running_transaction != transaction);
 
+	trace_jbd2_drop_transaction(journal, transaction);
+
 	jbd_debug(1, "Dropping transaction %d, all done\n", transaction->t_tid);
 }
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index f24df13..5953b3d 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1185,6 +1185,8 @@ void jbd2_journal_update_superblock(journal_t *journal, int wait)
 	} else
 		write_dirty_buffer(bh, WRITE);
 
+	trace_jbd2_update_superblock_end(journal, wait);
+
 out:
 	/* If we have just flushed the log (by marking s_start==0), then
 	 * any future commit will have to be careful to update the
diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h
index 7596441..ae59bc2 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),
 
@@ -229,6 +236,27 @@ TRACE_EVENT(jbd2_cleanup_journal_tail,
 		  __entry->block_nr, __entry->freed)
 );
 
+TRACE_EVENT(jbd2_update_superblock_end,
+
+	TP_PROTO(journal_t *journal, int wait),
+
+	TP_ARGS(journal, wait),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,  dev			)
+		__field(	int,    wait			)
+	),
+
+	TP_fast_assign(
+		__entry->dev		= journal->j_fs_dev->bd_dev;
+		__entry->wait		= wait;
+	),
+
+	TP_printk("dev %d,%d wait %d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->wait)
+);
+
 #endif /* _TRACE_JBD2_H */
 
 /* This part must be outside protection */
-- 
1.7.1

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