diff options
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 10 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 6 |
2 files changed, 13 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 0bf8a6082bb8..66065e60fdbc 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -1294,6 +1294,13 @@ static unsigned int drbd_al_extents_max(struct drbd_backing_dev *bdev) return (al_size_4k - 1) * AL_CONTEXT_PER_TRANSACTION; } +static bool write_ordering_changed(struct disk_conf *a, struct disk_conf *b) +{ + return a->disk_barrier != b->disk_barrier || + a->disk_flushes != b->disk_flushes || + a->disk_drain != b->disk_drain; +} + int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) { struct drbd_config_context adm_ctx; @@ -1400,7 +1407,8 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) else set_bit(MD_NO_FUA, &device->flags); - drbd_bump_write_ordering(device->resource, NULL, WO_bdev_flush); + if (write_ordering_changed(old_disk_conf, new_disk_conf)) + drbd_bump_write_ordering(device->resource, NULL, WO_bdev_flush); drbd_md_sync(device); diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index bb1434dfec8a..8d8a6b7f8f5d 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1290,7 +1290,8 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin }; pwo = resource->write_ordering; - wo = min(pwo, wo); + if (wo != WO_bdev_flush) + wo = min(pwo, wo); rcu_read_lock(); idr_for_each_entry(&resource->devices, device, vnr) { if (get_ldev(device)) { @@ -1300,11 +1301,12 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin put_ldev(device); } } - rcu_read_unlock(); if (bdev) wo = max_allowed_wo(bdev, wo); + rcu_read_unlock(); + resource->write_ordering = wo; if (pwo != resource->write_ordering || wo == WO_bdev_flush) drbd_info(resource, "Method to ensure write ordering: %s\n", write_ordering_str[resource->write_ordering]); |