diff options
| author | Jan Kara <jack@suse.cz> | 2019-11-05 19:44:22 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-11-06 00:00:48 +0300 |
| commit | 5559b2d81b51de75cb7864bb1fbb82982f7e8fff (patch) | |
| tree | 2784d50f7c9f9fed46f5247b887b6de4567070cd /fs/jbd2 | |
| parent | 150549ed2fcf4be9bf3efedd99b72924dff26166 (diff) | |
| download | linux-5559b2d81b51de75cb7864bb1fbb82982f7e8fff.tar.xz | |
jbd2: Drop pointless wakeup from jbd2_journal_stop()
When we drop last handle from a transaction and journal->j_barrier_count
> 0, jbd2_journal_stop() wakes up journal->j_wait_transaction_locked
wait queue. This looks pointless - wait for outstanding handles always
happens on journal->j_wait_updates waitqueue.
journal->j_wait_transaction_locked is used to wait for transaction state
changes and by start_this_handle() for waiting until
journal->j_barrier_count drops to 0. The first case is clearly
irrelevant here since only jbd2 thread changes transaction state. The
second case looks related but jbd2_journal_unlock_updates() is
responsible for the wakeup in this case. So just drop the wakeup.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-16-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2')
| -rw-r--r-- | fs/jbd2/transaction.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index a160c3f665f9..d648cec3f90f 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1831,11 +1831,8 @@ int jbd2_journal_stop(handle_t *handle) * once we do this, we must not dereference transaction * pointer again. */ - if (atomic_dec_and_test(&transaction->t_updates)) { + if (atomic_dec_and_test(&transaction->t_updates)) wake_up(&journal->j_wait_updates); - if (journal->j_barrier_count) - wake_up(&journal->j_wait_transaction_locked); - } rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_); |