diff options
| author | Philipp Reisner | 2012-02-20 21:53:28 +0100 |
|---|---|---|
| committer | Philipp Reisner | 2012-11-08 16:58:31 +0100 |
| commit | 9a51ab1c1b3c1e21f076cdd571bbe6ca7d1b504c (patch) | |
| tree | 863ba573f9a803d5f64979dae566a89ea22bbe5f /drivers/block/drbd | |
| parent | 26ec92871be1e6bd48d0be9ab38ee1ebbeea49f1 (diff) | |
drbd: New disk option al-updates
By disabling al-updates one might increase performace. The price for
that is that in case a crashed primary (that had al-updates disabled)
is reintegraded, it will receive a full-resync instead of a bitmap
based resync.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd')
| -rw-r--r-- | drivers/block/drbd/drbd_actlog.c | 12 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 17 |
2 files changed, 25 insertions, 4 deletions
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index 9eae28944312..83d48d210b69 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -276,8 +276,16 @@ void drbd_al_begin_io(struct drbd_conf *mdev, struct drbd_interval *i) /* Double check: it may have been committed by someone else, * while we have been waiting for the lock. */ if (mdev->act_log->pending_changes) { - al_write_transaction(mdev); - mdev->al_writ_cnt++; + bool write_al_updates; + + rcu_read_lock(); + write_al_updates = rcu_dereference(mdev->ldev->disk_conf)->al_updates; + rcu_read_unlock(); + + if (write_al_updates) { + al_write_transaction(mdev); + mdev->al_writ_cnt++; + } spin_lock_irq(&mdev->al_lock); /* FIXME diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index dc5bd6bbb280..c5d4fac1a111 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -1230,6 +1230,11 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info) mutex_unlock(&mdev->tconn->conf_update); + if (new_disk_conf->al_updates) + mdev->ldev->md.flags &= MDF_AL_DISABLED; + else + mdev->ldev->md.flags |= MDF_AL_DISABLED; + drbd_bump_write_ordering(mdev->tconn, WO_bdev_flush); drbd_md_sync(mdev); @@ -1545,7 +1550,9 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) } else if (dd == grew) set_bit(RESYNC_AFTER_NEG, &mdev->flags); - if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) { + if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC) || + (test_bit(CRASHED_PRIMARY, &mdev->flags) && + drbd_md_test_flag(mdev->ldev, MDF_AL_DISABLED))) { dev_info(DEV, "Assuming that all blocks are out of sync " "(aka FullSync)\n"); if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, @@ -1588,13 +1595,19 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) if (ns.disk == D_CONSISTENT && (ns.pdsk == D_OUTDATED || rcu_dereference(mdev->ldev->disk_conf)->fencing == FP_DONT_CARE)) ns.disk = D_UP_TO_DATE; - rcu_read_unlock(); /* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND, MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before this point, because drbd_request_state() modifies these flags. */ + if (rcu_dereference(mdev->ldev->disk_conf)->al_updates) + mdev->ldev->md.flags &= MDF_AL_DISABLED; + else + mdev->ldev->md.flags |= MDF_AL_DISABLED; + + rcu_read_unlock(); + /* In case we are C_CONNECTED postpone any decision on the new disk state after the negotiation phase. */ if (mdev->state.conn == C_CONNECTED) { |