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| author | Theodore Ts'o <tytso@mit.edu> | 2014-03-08 19:11:36 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-03-08 19:11:36 -0500 |
| commit | 3469a32a1e948c54204b5dd6f7476a7d11349e9e (patch) | |
| tree | d6039ae11b109ddb71e9724a46d54337535a2d6e /fs/jbd2/journal.c | |
| parent | df3c1e9a05ff25aca9f54a6c08b77003e2e32bf1 (diff) | |
| download | op-kernel-dev-3469a32a1e948c54204b5dd6f7476a7d11349e9e.zip op-kernel-dev-3469a32a1e948c54204b5dd6f7476a7d11349e9e.tar.gz | |
jbd2: don't hold j_state_lock while calling wake_up()
The j_state_lock is one of the hottest locks in the jbd2 layer and
thus one of its scalability bottlenecks.
We don't need to be holding the j_state_lock while we are calling
wake_up(&journal->j_wait_commit), so release the lock a little bit
earlier.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/jbd2/journal.c')
| -rw-r--r-- | fs/jbd2/journal.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 244b6f6..67b8e30 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -302,8 +302,8 @@ static void journal_kill_thread(journal_t *journal) journal->j_flags |= JBD2_UNMOUNT; while (journal->j_task) { - wake_up(&journal->j_wait_commit); write_unlock(&journal->j_state_lock); + wake_up(&journal->j_wait_commit); wait_event(journal->j_wait_done_commit, journal->j_task == NULL); write_lock(&journal->j_state_lock); } @@ -710,8 +710,8 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid) while (tid_gt(tid, journal->j_commit_sequence)) { jbd_debug(1, "JBD2: want %d, j_commit_sequence=%d\n", tid, journal->j_commit_sequence); - wake_up(&journal->j_wait_commit); read_unlock(&journal->j_state_lock); + wake_up(&journal->j_wait_commit); wait_event(journal->j_wait_done_commit, !tid_gt(tid, journal->j_commit_sequence)); read_lock(&journal->j_state_lock); |
