[PATCH 2/4] jbd2: make kjournald2 commit wait freezable

[Dai Junbing]

While waiting for commit work, kjournald2 may be woken during suspend
and resume due to freezer state transitions. This causes avoidable CPU
activity in the suspend/resume path and adds unnecessary power overhead.

Make the commit wait freezable so the thread is not unnecessarily woken
by the freezer during suspend/resume.

Signed-off-by: Dai Junbing <daijunbing@xxxxxxxx>
---
 fs/jbd2/journal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 4f397fcdb13c..d7ffe60c8793 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -222,7 +222,7 @@ static int kjournald2(void *arg)
 		DEFINE_WAIT(wait);
 
 		prepare_to_wait(&journal->j_wait_commit, &wait,
-				TASK_INTERRUPTIBLE);
+				TASK_INTERRUPTIBLE|TASK_FREEZABLE);
 		transaction = journal->j_running_transaction;
 		if (transaction == NULL ||
 		    time_before(jiffies, transaction->t_expires)) {
-- 
2.25.1