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| author | Eric Sandeen | 2014-07-06 01:18:22 +0200 |
|---|---|---|
| committer | Theodore Ts'o | 2014-07-06 01:18:22 +0200 |
| commit | 5dd214248f94d430d70e9230bda72f2654ac88a8 (patch) | |
| tree | 756629dd87cf1d0e359f95b8836f53863905f3fc | |
| parent | ext4: clarify ext4_error message in ext4_mb_generate_buddy_error() (diff) | |
| download | kernel-qcow2-linux-5dd214248f94d430d70e9230bda72f2654ac88a8.tar.gz kernel-qcow2-linux-5dd214248f94d430d70e9230bda72f2654ac88a8.tar.xz kernel-qcow2-linux-5dd214248f94d430d70e9230bda72f2654ac88a8.zip | |
ext4: disable synchronous transaction batching if max_batch_time==0
The mount manpage says of the max_batch_time option,
This optimization can be turned off entirely
by setting max_batch_time to 0.
But the code doesn't do that. So fix the code to do
that.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
| -rw-r--r-- | fs/ext4/super.c | 2 | ||||
| -rw-r--r-- | fs/jbd2/transaction.c | 5 |
2 files changed, 4 insertions, 3 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 342394772b6c..6297c07c937f 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1525,8 +1525,6 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token, arg = JBD2_DEFAULT_MAX_COMMIT_AGE; sbi->s_commit_interval = HZ * arg; } else if (token == Opt_max_batch_time) { - if (arg == 0) - arg = EXT4_DEF_MAX_BATCH_TIME; sbi->s_max_batch_time = arg; } else if (token == Opt_min_batch_time) { sbi->s_min_batch_time = arg; diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 38cfcf5f6fce..6f0f590cc5a3 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1588,9 +1588,12 @@ int jbd2_journal_stop(handle_t *handle) * to perform a synchronous write. We do this to detect the * case where a single process is doing a stream of sync * writes. No point in waiting for joiners in that case. + * + * Setting max_batch_time to 0 disables this completely. */ pid = current->pid; - if (handle->h_sync && journal->j_last_sync_writer != pid) { + if (handle->h_sync && journal->j_last_sync_writer != pid && + journal->j_max_batch_time) { u64 commit_time, trans_time; journal->j_last_sync_writer = pid; |