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| author | Li RongQing <roy.qing.li@gmail.com> | 2014-09-06 19:06:11 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-09 11:48:07 -0700 |
| commit | e403aded79a1bfb610adc53490ded8d2058f9daf (patch) | |
| tree | dd65f6d8b16bb8c64e4c1c47cf0f3cb36d5e5584 /net/openvswitch/vport.c | |
| parent | 5aaa62d608464bedb30afc62e5073629de505afb (diff) | |
| download | lwn-e403aded79a1bfb610adc53490ded8d2058f9daf.tar.gz lwn-e403aded79a1bfb610adc53490ded8d2058f9daf.zip | |
openvswitch: change the data type of error status to atomic_long_t
Change the date type of error status from u64 to atomic_long_t, and use atomic
operation, then remove the lock which is used to protect the error status.
The operation of atomic maybe faster than spin lock.
Cc: Pravin Shelar <pshelar@nicira.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/vport.c')
| -rw-r--r-- | net/openvswitch/vport.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 6d8f2ec481d9..f7e63f9df7b9 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -148,8 +148,6 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, return ERR_PTR(-ENOMEM); } - spin_lock_init(&vport->stats_lock); - return vport; } @@ -268,14 +266,10 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) * netdev-stats can be directly read over netlink-ioctl. */ - spin_lock_bh(&vport->stats_lock); - - stats->rx_errors = vport->err_stats.rx_errors; - stats->tx_errors = vport->err_stats.tx_errors; - stats->tx_dropped = vport->err_stats.tx_dropped; - stats->rx_dropped = vport->err_stats.rx_dropped; - - spin_unlock_bh(&vport->stats_lock); + stats->rx_errors = atomic_long_read(&vport->err_stats.rx_errors); + stats->tx_errors = atomic_long_read(&vport->err_stats.tx_errors); + stats->tx_dropped = atomic_long_read(&vport->err_stats.tx_dropped); + stats->rx_dropped = atomic_long_read(&vport->err_stats.rx_dropped); for_each_possible_cpu(i) { const struct pcpu_sw_netstats *percpu_stats; @@ -495,27 +489,24 @@ int ovs_vport_send(struct vport *vport, struct sk_buff *skb) static void ovs_vport_record_error(struct vport *vport, enum vport_err_type err_type) { - spin_lock(&vport->stats_lock); - switch (err_type) { case VPORT_E_RX_DROPPED: - vport->err_stats.rx_dropped++; + atomic_long_inc(&vport->err_stats.rx_dropped); break; case VPORT_E_RX_ERROR: - vport->err_stats.rx_errors++; + atomic_long_inc(&vport->err_stats.rx_errors); break; case VPORT_E_TX_DROPPED: - vport->err_stats.tx_dropped++; + atomic_long_inc(&vport->err_stats.tx_dropped); break; case VPORT_E_TX_ERROR: - vport->err_stats.tx_errors++; + atomic_long_inc(&vport->err_stats.tx_errors); break; } - spin_unlock(&vport->stats_lock); } static void free_vport_rcu(struct rcu_head *rcu) |