diff options
| author |   majianpeng <majianpeng@gmail.com> | 2013-11-14 15:16:18 +1100 |
|---|---|---|
| committer |   NeilBrown <neilb@suse.de> | 2013-11-19 15:19:18 +1100 |
| commit | b364e3d048e49b1d177eb7ee7853e77aa0560464 (patch) | |
| tree | 5d13c7e1a010f3976567bfbc3a1b6226b9db96d6 | |
| parent | md: Convert use of typedef ctl_table to struct ctl_table (diff) | |
| download | linux-dev-b364e3d048e49b1d177eb7ee7853e77aa0560464.tar.xz linux-dev-b364e3d048e49b1d177eb7ee7853e77aa0560464.zip | |
raid1: Add a field array_frozen to indicate whether raid in freeze state.
Because the following patch will rewrite the content between normal IO
and resync IO. So we used a parameter to indicate whether raid is in freeze
array.
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
| -rw-r--r-- | drivers/md/raid1.c | 15 | ||||
| -rw-r--r-- | drivers/md/raid1.h | 1 |
2 files changed, 8 insertions, 8 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index aacf6bf352d8..729db21dc829 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -829,6 +829,7 @@ static void raise_barrier(struct r1conf *conf) /* Now wait for all pending IO to complete */ wait_event_lock_irq(conf->wait_barrier, + !conf->array_frozen && !conf->nr_pending && conf->barrier < RESYNC_DEPTH, conf->resync_lock); @@ -860,10 +861,11 @@ static void wait_barrier(struct r1conf *conf) * count down. */ wait_event_lock_irq(conf->wait_barrier, - !conf->barrier || + !conf->array_frozen && + (!conf->barrier || (conf->nr_pending && current->bio_list && - !bio_list_empty(current->bio_list)), + !bio_list_empty(current->bio_list))), conf->resync_lock); conf->nr_waiting--; } @@ -884,8 +886,7 @@ static void freeze_array(struct r1conf *conf, int extra) { /* stop syncio and normal IO and wait for everything to * go quite. - * We increment barrier and nr_waiting, and then - * wait until nr_pending match nr_queued+extra + * We wait until nr_pending match nr_queued+extra * This is called in the context of one normal IO request * that has failed. Thus any sync request that might be pending * will be blocked by nr_pending, and we need to wait for @@ -895,8 +896,7 @@ static void freeze_array(struct r1conf *conf, int extra) * we continue. */ spin_lock_irq(&conf->resync_lock); - conf->barrier++; - conf->nr_waiting++; + conf->array_frozen = 1; wait_event_lock_irq_cmd(conf->wait_barrier, conf->nr_pending == conf->nr_queued+extra, conf->resync_lock, @@ -907,8 +907,7 @@ static void unfreeze_array(struct r1conf *conf) { /* reverse the effect of the freeze */ spin_lock_irq(&conf->resync_lock); - conf->barrier--; - conf->nr_waiting--; + conf->array_frozen = 0; wake_up(&conf->wait_barrier); spin_unlock_irq(&conf->resync_lock); } diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h index 0ff3715fb7eb..331a98a231b4 100644 --- a/drivers/md/raid1.h +++ b/drivers/md/raid1.h @@ -65,6 +65,7 @@ struct r1conf { int nr_waiting; int nr_queued; int barrier; + int array_frozen; /* Set to 1 if a full sync is needed, (fresh device added). * Cleared when a sync completes. |