diff options
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 2dc1934925ec..d24adc50a31f 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -71,6 +71,9 @@ static void allow_barrier(struct r1conf *conf, sector_t start_next_window, sector_t bi_sector); static void lower_barrier(struct r1conf *conf); +#define raid1_log(md, fmt, args...) \ + do { if ((md)->queue) blk_add_trace_msg((md)->queue, "raid1 " fmt, ##args); } while (0) + static void * r1bio_pool_alloc(gfp_t gfp_flags, void *data) { struct pool_info *pi = data; @@ -861,6 +864,7 @@ static sector_t wait_barrier(struct r1conf *conf, struct bio *bio) * that queue to allow conf->start_next_window * to increase. */ + raid1_log(conf->mddev, "wait barrier"); wait_event_lock_irq(conf->wait_barrier, !conf->array_frozen && (!conf->barrier || @@ -940,6 +944,7 @@ static void freeze_array(struct r1conf *conf, int extra) */ spin_lock_irq(&conf->resync_lock); conf->array_frozen = 1; + raid1_log(conf->mddev, "wait freeze"); wait_event_lock_irq_cmd(conf->wait_barrier, conf->nr_pending == conf->nr_queued+extra, conf->resync_lock, @@ -1144,6 +1149,7 @@ read_again: * take care not to over-take any writes * that are 'behind' */ + raid1_log(mddev, "wait behind writes"); wait_event(bitmap->behind_wait, atomic_read(&bitmap->behind_writes) == 0); } @@ -1208,6 +1214,7 @@ read_again: */ if (conf->pending_count >= max_queued_requests) { md_wakeup_thread(mddev->thread); + raid1_log(mddev, "wait queued"); wait_event(conf->wait_barrier, conf->pending_count < max_queued_requests); } @@ -1299,6 +1306,7 @@ read_again: rdev_dec_pending(conf->mirrors[j].rdev, mddev); r1_bio->state = 0; allow_barrier(conf, start_next_window, bio->bi_iter.bi_sector); + raid1_log(mddev, "wait rdev %d blocked", blocked_rdev->raid_disk); md_wait_for_blocked_rdev(blocked_rdev, mddev); start_next_window = wait_barrier(conf, bio); /* |