ext4: disable synchronous transaction batching if max_batch_time==0

[firefly-linux-kernel-4.4.55.git] / fs / jbd2 / transaction.c

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 38cfcf5f6fce6127807da86c8e5d6a9be867fb98..6f0f590cc5a3fc83aee029dd97bdb272771d99b8 100644 (file)
--- 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;