From: Andrew Perepechko <anserper@xxxxx> 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. Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx> Signed-off-by: Alexey Lyashkov <alexey.lyashkov@xxxxxxxxx> --- fs/jbd2/commit.c | 2 +- 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 b2b2bc9b88d9..ec2b55879e3a 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -570,7 +570,7 @@ 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) -- 2.31.1
