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| author |   Theodore Ts'o <tytso@mit.edu> | 2009-09-30 00:32:06 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-09-30 00:32:06 -0400 |
| commit | bf6993276f74d46776f35c45ddef29b981b1d1c6 (patch) | |
| tree | 5c9cb128fed29a83add1932b12443edaa6fd06cc /fs/jbd2/checkpoint.c | |
| parent | ext4: Use tracepoints for mb_history trace file (diff) | |
| download | linux-dev-bf6993276f74d46776f35c45ddef29b981b1d1c6.tar.xz linux-dev-bf6993276f74d46776f35c45ddef29b981b1d1c6.zip | |
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.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c index 5d70b3e6d49b..ca0f5eb62b20 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); |