diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid1.c | 17 | ||||
| -rw-r--r-- | drivers/md/raid10.c | 17 |
2 files changed, 30 insertions, 4 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index a0b225eb4ac4..118e0f69f224 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -737,9 +737,22 @@ static void wait_barrier(struct r1conf *conf) spin_lock_irq(&conf->resync_lock); if (conf->barrier) { conf->nr_waiting++; - wait_event_lock_irq(conf->wait_barrier, !conf->barrier, + /* Wait for the barrier to drop. + * However if there are already pending + * requests (preventing the barrier from + * rising completely), and the + * pre-process bio queue isn't empty, + * then don't wait, as we need to empty + * that queue to get the nr_pending + * count down. + */ + wait_event_lock_irq(conf->wait_barrier, + !conf->barrier || + (conf->nr_pending && + current->bio_list && + !bio_list_empty(current->bio_list)), conf->resync_lock, - ); + ); conf->nr_waiting--; } conf->nr_pending++; diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index f4f3edcdaf8d..2ae7021320e1 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -863,9 +863,22 @@ static void wait_barrier(struct r10conf *conf) spin_lock_irq(&conf->resync_lock); if (conf->barrier) { conf->nr_waiting++; - wait_event_lock_irq(conf->wait_barrier, !conf->barrier, + /* Wait for the barrier to drop. + * However if there are already pending + * requests (preventing the barrier from + * rising completely), and the + * pre-process bio queue isn't empty, + * then don't wait, as we need to empty + * that queue to get the nr_pending + * count down. + */ + wait_event_lock_irq(conf->wait_barrier, + !conf->barrier || + (conf->nr_pending && + current->bio_list && + !bio_list_empty(current->bio_list)), conf->resync_lock, - ); + ); conf->nr_waiting--; } conf->nr_pending++; |