From: Ding Tianhong <dingtianhong@huawei•com>
To: Jay Vosburgh <fubar@us•ibm.com>,
Andy Gospodarek <andy@greyhouse•net>,
"David S. Miller" <davem@davemloft•net>,
Nikolay Aleksandrov <nikolay@redhat•com>,
Veaceslav Falico <vfalico@redhat•com>,
Netdev <netdev@vger•kernel.org>
Subject: [PATCH net-next v2 7/10] bonding: rebuild the lock use for bond_3ad_state_machine_handler()
Date: Fri, 8 Nov 2013 10:08:08 +0800 [thread overview]
Message-ID: <527C4788.9090508@huawei.com> (raw)
The bond_3ad_state_machine_handler() use the bond lock to protect
the bond slave list and slave port, so as the before patch said,
I remove bond lock and replace with RCU.
The nots in the function is still too old, clean up the nots.
Suggested-by: Jay Vosburgh <fubar@us•ibm.com>
Suggested-by: Veaceslav Falico <vfalico@redhat•com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei•com>
---
drivers/net/bonding/bond_3ad.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 187b1b7..09edccf61 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -2068,18 +2068,18 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
struct slave *slave;
struct port *port;
- read_lock(&bond->lock);
+ rcu_read_lock();
- //check if there are any slaves
- if (!bond_has_slaves(bond))
+ /* check if there are any slaves */
+ if (!bond_has_slaves_rcu(bond))
goto re_arm;
- // check if agg_select_timer timer after initialize is timed out
+ /* check if agg_select_timer timer after initialize is timed out */
if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
- slave = bond_first_slave(bond);
+ slave = bond_first_slave_rcu(bond);
port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL;
- // select the active aggregator for the bond
+ /* select the active aggregator for the bond */
if (port) {
if (!port->slave) {
pr_warning("%s: Warning: bond's first port is uninitialized\n",
@@ -2093,8 +2093,8 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
bond_3ad_set_carrier(bond);
}
- // for each port run the state machines
- bond_for_each_slave(bond, slave, iter) {
+ /* for each port run the state machines */
+ bond_for_each_slave_rcu(bond, slave, iter) {
port = &(SLAVE_AD_INFO(slave).port);
if (!port->slave) {
pr_warning("%s: Warning: Found an uninitialized port\n",
@@ -2114,7 +2114,7 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
ad_mux_machine(port);
ad_tx_machine(port);
- // turn off the BEGIN bit, since we already handled it
+ /* turn off the BEGIN bit, since we already handled it */
if (port->sm_vars & AD_PORT_BEGIN)
port->sm_vars &= ~AD_PORT_BEGIN;
@@ -2122,9 +2122,8 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
}
re_arm:
+ rcu_read_unlock();
queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
-
- read_unlock(&bond->lock);
}
/**
--
1.8.2.1
next reply other threads:[~2013-11-08 2:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-08 2:08 Ding Tianhong [this message]
2013-11-08 15:43 ` [PATCH net-next v2 7/10] bonding: rebuild the lock use for bond_3ad_state_machine_handler() Nikolay Aleksandrov
2013-11-09 13:54 ` Ding Tianhong
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