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| author | Andrew Perepechko <anserper@ya.ru> | 2022-09-07 19:59:59 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2022-09-30 23:46:52 -0400 |
| commit | 34fc8768ec6089565d6d73bad26724083cecf7bd (patch) | |
| tree | 354ff9c6bc4be4c475e0c5c5a9a029d50ae101c9 | |
| parent | d1052d236eddf6aa851434db1897b942e8db9921 (diff) | |
| download | linux-rpi-34fc8768ec6089565d6d73bad26724083cecf7bd.tar.gz linux-rpi-34fc8768ec6089565d6d73bad26724083cecf7bd.tar.bz2 linux-rpi-34fc8768ec6089565d6d73bad26724083cecf7bd.zip | |
jbd2: wake up journal waiters in FIFO order, not LIFO
LIFO wakeup order is unfair and sometimes leads to a journal
user not being able to get a journal handle for hundreds of
transactions in a row.
FIFO wakeup can make things more fair.
Cc: stable@kernel.org
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@gmail.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20220907165959.1137482-1-alexey.lyashkov@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/jbd2/commit.c | 2 | ||||
| -rw-r--r-- | fs/jbd2/transaction.c | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 6b51d2dc56e2..885a7a6cc53e 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -568,7 +568,7 @@ void jbd2_journal_commit_transaction(journal_t *journal) journal->j_running_transaction = NULL; start_time = ktime_get(); commit_transaction->t_log_start = journal->j_head; - wake_up(&journal->j_wait_transaction_locked); + wake_up_all(&journal->j_wait_transaction_locked); write_unlock(&journal->j_state_lock); jbd2_debug(3, "JBD2: commit phase 2a\n"); diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index e1be93ccd81c..6a404ac1c178 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -168,7 +168,7 @@ static void wait_transaction_locked(journal_t *journal) int need_to_start; tid_t tid = journal->j_running_transaction->t_tid; - prepare_to_wait(&journal->j_wait_transaction_locked, &wait, + prepare_to_wait_exclusive(&journal->j_wait_transaction_locked, &wait, TASK_UNINTERRUPTIBLE); need_to_start = !tid_geq(journal->j_commit_request, tid); read_unlock(&journal->j_state_lock); @@ -194,7 +194,7 @@ static void wait_transaction_switching(journal_t *journal) read_unlock(&journal->j_state_lock); return; } - prepare_to_wait(&journal->j_wait_transaction_locked, &wait, + prepare_to_wait_exclusive(&journal->j_wait_transaction_locked, &wait, TASK_UNINTERRUPTIBLE); read_unlock(&journal->j_state_lock); /* @@ -920,7 +920,7 @@ void jbd2_journal_unlock_updates (journal_t *journal) write_lock(&journal->j_state_lock); --journal->j_barrier_count; write_unlock(&journal->j_state_lock); - wake_up(&journal->j_wait_transaction_locked); + wake_up_all(&journal->j_wait_transaction_locked); } static void warn_dirty_buffer(struct buffer_head *bh) |