diff options
| author | dingtianhong <dingtianhong@huawei.com> | 2013-12-13 06:19:45 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-14 10:58:01 +0400 |
| commit | 733ab63935beab905b03a329cdc544e8c171b6b9 (patch) | |
| tree | f625f315d8a1d725ae5389a139bbb0b7bed0540a | |
| parent | 4cb4f97b7e361745281e843499ba58691112d2f8 (diff) | |
| download | linux-733ab63935beab905b03a329cdc544e8c171b6b9.tar.xz | |
bonding: rebuild the lock use for bond_alb_monitor()
The bond_alb_monitor use bond lock to protect the bond slave list,
it is no effect here, we need to use RTNL or RCU to replace bond lock,
the bond_alb_monitor will called 10 times one second, RTNL may loss
performance here, so I replace bond lock with RCU to protect the
bond slave list, also the RTNL is preserved, the logic of the monitor
did not changed.
Suggested-by: Nikolay Aleksandrov <nikolay@redhat.com>
Suggested-by: Jay Vosburgh <fubar@us.ibm.com>
Suggested-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bonding/bond_alb.c | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c index 7b806e330364..759ddeebe390 100644 --- a/drivers/net/bonding/bond_alb.c +++ b/drivers/net/bonding/bond_alb.c @@ -815,7 +815,7 @@ static void rlb_rebalance(struct bonding *bond) for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->used_next) { client_info = &(bond_info->rx_hashtbl[hash_index]); - assigned_slave = rlb_next_rx_slave(bond); + assigned_slave = __rlb_next_rx_slave(bond); if (assigned_slave && (client_info->slave != assigned_slave)) { client_info->slave = assigned_slave; client_info->ntt = 1; @@ -1494,14 +1494,14 @@ void bond_alb_monitor(struct work_struct *work) struct list_head *iter; struct slave *slave; - read_lock(&bond->lock); - if (!bond_has_slaves(bond)) { bond_info->tx_rebalance_counter = 0; bond_info->lp_counter = 0; goto re_arm; } + rcu_read_lock(); + bond_info->tx_rebalance_counter++; bond_info->lp_counter++; @@ -1514,7 +1514,7 @@ void bond_alb_monitor(struct work_struct *work) */ read_lock(&bond->curr_slave_lock); - bond_for_each_slave(bond, slave, iter) + bond_for_each_slave_rcu(bond, slave, iter) alb_send_learning_packets(slave, slave->dev->dev_addr); read_unlock(&bond->curr_slave_lock); @@ -1527,7 +1527,7 @@ void bond_alb_monitor(struct work_struct *work) read_lock(&bond->curr_slave_lock); - bond_for_each_slave(bond, slave, iter) { + bond_for_each_slave_rcu(bond, slave, iter) { tlb_clear_slave(bond, slave, 1); if (slave == bond->curr_active_slave) { SLAVE_TLB_INFO(slave).load = @@ -1551,11 +1551,9 @@ void bond_alb_monitor(struct work_struct *work) * dev_set_promiscuity requires rtnl and * nothing else. Avoid race with bond_close. */ - read_unlock(&bond->lock); - if (!rtnl_trylock()) { - read_lock(&bond->lock); + rcu_read_unlock(); + if (!rtnl_trylock()) goto re_arm; - } bond_info->rlb_promisc_timeout_counter = 0; @@ -1567,7 +1565,7 @@ void bond_alb_monitor(struct work_struct *work) bond_info->primary_is_promisc = 0; rtnl_unlock(); - read_lock(&bond->lock); + rcu_read_lock(); } if (bond_info->rlb_rebalance) { @@ -1589,11 +1587,9 @@ void bond_alb_monitor(struct work_struct *work) } } } - + rcu_read_unlock(); re_arm: queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); - - read_unlock(&bond->lock); } /* assumption: called before the slave is attached to the bond |