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authorTheodore Ts'o <tytso@mit.edu>2009-09-30 00:32:06 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-09-30 00:32:06 -0400
commitbf6993276f74d46776f35c45ddef29b981b1d1c6 (patch)
tree5c9cb128fed29a83add1932b12443edaa6fd06cc /fs/jbd2/checkpoint.c
parent296c355cd6443d89fa251885a8d78778fe111dc4 (diff)
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jbd2: Use tracepoints for history file
The /proc/fs/jbd2/<dev>/history was maintained manually; by using tracepoints, we can get all of the existing functionality of the /proc file plus extra capabilities thanks to the ftrace infrastructure. We save memory as a bonus. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/checkpoint.c')
-rw-r--r--fs/jbd2/checkpoint.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 5d70b3e6d49..ca0f5eb62b2 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -643,6 +643,7 @@ out:
int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
{
+ struct transaction_chp_stats_s *stats;
transaction_t *transaction;
journal_t *journal;
int ret = 0;
@@ -679,6 +680,12 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
/* OK, that was the last buffer for the transaction: we can now
safely remove this transaction from the log */
+ stats = &transaction->t_chp_stats;
+ if (stats->cs_chp_time)
+ stats->cs_chp_time = jbd2_time_diff(stats->cs_chp_time,
+ jiffies);
+ trace_jbd2_checkpoint_stats(journal->j_fs_dev->bd_dev,
+ transaction->t_tid, stats);
__jbd2_journal_drop_transaction(journal, transaction);
kfree(transaction);