提交 d7cfa468 编写于 作者: T Theodore Ts'o

ext4: display average commit time

Display the average commit time (which is used by the ext4 fsync
batching patch) in /proc/fs/jbd2/*/info for performance tuning
purposes.
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
上级 e07f7183
......@@ -40,6 +40,7 @@
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/div64.h>
EXPORT_SYMBOL(jbd2_journal_start);
EXPORT_SYMBOL(jbd2_journal_restart);
......@@ -824,6 +825,8 @@ static int jbd2_seq_info_show(struct seq_file *seq, void *v)
jiffies_to_msecs(s->stats->u.run.rs_flushing / s->stats->ts_tid));
seq_printf(seq, " %ums logging transaction\n",
jiffies_to_msecs(s->stats->u.run.rs_logging / s->stats->ts_tid));
seq_printf(seq, " %luus average transaction commit time\n",
do_div(s->journal->j_average_commit_time, 1000));
seq_printf(seq, " %lu handles per transaction\n",
s->stats->u.run.rs_handle_count / s->stats->ts_tid);
seq_printf(seq, " %lu blocks per transaction\n",
......
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