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authorTheodore Ts'o <tytso@mit.edu>2009-12-23 07:45:44 -0500
committerTheodore Ts'o <tytso@mit.edu>2009-12-23 07:45:44 -0500
commit71f2be213a0009098819e5c04f75ff19f84f2122 (patch)
treeaf3dcbb307a8cccc24670945c14c4b3d32bbd2c0
parent1f2acb6017d8528135ec3b01ab7cd2be6ea0630b (diff)
downloadlinux-71f2be213a0009098819e5c04f75ff19f84f2122.tar.bz2
ext4: Add new tracepoint for jbd2_cleanup_journal_tail
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
-rw-r--r--fs/jbd2/checkpoint.c1
-rw-r--r--include/trace/events/jbd2.h28
2 files changed, 29 insertions, 0 deletions
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 886849370950..30beb11ef928 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -507,6 +507,7 @@ int jbd2_cleanup_journal_tail(journal_t *journal)
if (blocknr < journal->j_tail)
freed = freed + journal->j_last - journal->j_first;
+ trace_jbd2_cleanup_journal_tail(journal, first_tid, blocknr, freed);
jbd_debug(1,
"Cleaning journal tail from %d to %d (offset %lu), "
"freeing %lu\n",
diff --git a/include/trace/events/jbd2.h b/include/trace/events/jbd2.h
index 96b370a050de..bf16545cc977 100644
--- a/include/trace/events/jbd2.h
+++ b/include/trace/events/jbd2.h
@@ -199,6 +199,34 @@ TRACE_EVENT(jbd2_checkpoint_stats,
__entry->forced_to_close, __entry->written, __entry->dropped)
);
+TRACE_EVENT(jbd2_cleanup_journal_tail,
+
+ TP_PROTO(journal_t *journal, tid_t first_tid,
+ unsigned long block_nr, unsigned long freed),
+
+ TP_ARGS(journal, first_tid, block_nr, freed),
+
+ TP_STRUCT__entry(
+ __field( dev_t, dev )
+ __field( tid_t, tail_sequence )
+ __field( tid_t, first_tid )
+ __field(unsigned long, block_nr )
+ __field(unsigned long, freed )
+ ),
+
+ TP_fast_assign(
+ __entry->dev = journal->j_fs_dev->bd_dev;
+ __entry->tail_sequence = journal->j_tail_sequence;
+ __entry->first_tid = first_tid;
+ __entry->block_nr = block_nr;
+ __entry->freed = freed;
+ ),
+
+ TP_printk("dev %s from %u to %u offset %lu freed %lu",
+ jbd2_dev_to_name(__entry->dev), __entry->tail_sequence,
+ __entry->first_tid, __entry->block_nr, __entry->freed)
+);
+
#endif /* _TRACE_JBD2_H */
/* This part must be outside protection */