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Date: Thu, 03 Jul 2008 00:04:31 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
CC: vinay@...ux.vnet.ibm.com, krkumar2@...ibm.com, mchan@...adcom.com,
Matheos.Worku@....COM, linux-wireless@...r.kernel.org
Subject: [PATCH 23/39]: net: In core generic transmit paths, use queue
aware tests.
Even pktgen is mostly queue aware now.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
include/linux/netdevice.h | 3 ++-
include/net/pkt_sched.h | 4 +---
net/core/dev.c | 11 +++++------
net/core/netpoll.c | 8 +++-----
net/core/pktgen.c | 16 +++++++---------
net/sched/sch_generic.c | 5 ++---
net/sched/sch_teql.c | 6 ++----
7 files changed, 22 insertions(+), 31 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 89bab7e..2ab4d92 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1162,7 +1162,8 @@ extern int dev_set_mtu(struct net_device *, int);
extern int dev_set_mac_address(struct net_device *,
struct sockaddr *);
extern int dev_hard_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
+ struct net_device *dev,
+ struct netdev_queue *dev_queue);
extern int netdev_budget;
diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h
index 1e2263c..89b106e 100644
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -84,9 +84,7 @@ extern void __qdisc_run(struct netdev_queue *dev_queue);
static inline void qdisc_run(struct netdev_queue *dev_queue)
{
- struct net_device *dev = dev_queue->dev;
-
- if (!netif_queue_stopped(dev) &&
+ if (!netif_tx_queue_stopped(dev_queue) &&
!test_and_set_bit(__QUEUE_STATE_QDISC_RUNNING, &dev_queue->state))
__qdisc_run(dev_queue);
}
diff --git a/net/core/dev.c b/net/core/dev.c
index 039ceff..5209a3f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1598,7 +1598,8 @@ static int dev_gso_segment(struct sk_buff *skb)
return 0;
}
-int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
+ struct netdev_queue *dev_queue)
{
if (likely(!skb->next)) {
if (!list_empty(&ptype_all))
@@ -1627,8 +1628,7 @@ gso:
skb->next = nskb;
return rc;
}
- if (unlikely((netif_queue_stopped(dev) ||
- netif_subqueue_stopped(dev, skb)) &&
+ if (unlikely(netif_tx_queue_stopped(dev_queue) &&
skb->next))
return NETDEV_TX_BUSY;
} while (skb->next);
@@ -1762,10 +1762,9 @@ gso:
HARD_TX_LOCK(dev, txq, cpu);
- if (!netif_queue_stopped(dev) &&
- !netif_subqueue_stopped(dev, skb)) {
+ if (!netif_tx_queue_stopped(txq)) {
rc = 0;
- if (!dev_hard_start_xmit(skb, dev)) {
+ if (!dev_hard_start_xmit(skb, dev, txq)) {
HARD_TX_UNLOCK(dev, txq);
goto out;
}
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 8fb134d..2271d19 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -66,9 +66,8 @@ static void queue_process(struct work_struct *work)
local_irq_save(flags);
netif_tx_lock(dev);
- if ((netif_queue_stopped(dev) ||
- netif_subqueue_stopped(dev, skb)) ||
- dev->hard_start_xmit(skb, dev) != NETDEV_TX_OK) {
+ if (netif_subqueue_stopped(dev, skb) ||
+ dev->hard_start_xmit(skb, dev) != NETDEV_TX_OK) {
skb_queue_head(&npinfo->txq, skb);
netif_tx_unlock(dev);
local_irq_restore(flags);
@@ -285,8 +284,7 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
tries > 0; --tries) {
if (netif_tx_trylock(dev)) {
- if (!netif_queue_stopped(dev) &&
- !netif_subqueue_stopped(dev, skb))
+ if (!netif_subqueue_stopped(dev, skb))
status = dev->hard_start_xmit(skb, dev);
netif_tx_unlock(dev);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index fdf5377..f6dc5b3 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3262,6 +3262,7 @@ static void pktgen_rem_thread(struct pktgen_thread *t)
static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
{
+ struct netdev_queue *odev_queue;
struct net_device *odev = NULL;
__u64 idle_start = 0;
int ret;
@@ -3285,9 +3286,8 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
}
}
- if ((netif_queue_stopped(odev) ||
- (pkt_dev->skb &&
- netif_subqueue_stopped(odev, pkt_dev->skb))) ||
+ odev_queue = &odev->tx_queue;
+ if (netif_tx_queue_stopped(odev_queue) ||
need_resched()) {
idle_start = getCurUs();
@@ -3303,8 +3303,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
pkt_dev->idle_acc += getCurUs() - idle_start;
- if (netif_queue_stopped(odev) ||
- netif_subqueue_stopped(odev, pkt_dev->skb)) {
+ if (netif_tx_queue_stopped(odev_queue)) {
pkt_dev->next_tx_us = getCurUs(); /* TODO */
pkt_dev->next_tx_ns = 0;
goto out; /* Try the next interface */
@@ -3331,9 +3330,8 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
}
}
- netif_tx_lock_bh(odev);
- if (!netif_queue_stopped(odev) &&
- !netif_subqueue_stopped(odev, pkt_dev->skb)) {
+ __netif_tx_lock_bh(odev_queue);
+ if (!netif_tx_queue_stopped(odev_queue)) {
atomic_inc(&(pkt_dev->skb->users));
retry_now:
@@ -3377,7 +3375,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
pkt_dev->next_tx_ns = 0;
}
- netif_tx_unlock_bh(odev);
+ __netif_tx_unlock_bh(odev_queue);
/* If pkt_dev->count is zero, then run forever */
if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index b919c0b..1092d54 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -156,7 +156,7 @@ static inline int qdisc_restart(struct netdev_queue *dev_queue)
HARD_TX_LOCK(dev, dev_queue, smp_processor_id());
if (!netif_subqueue_stopped(dev, skb))
- ret = dev_hard_start_xmit(skb, dev);
+ ret = dev_hard_start_xmit(skb, dev, dev_queue);
HARD_TX_UNLOCK(dev, dev_queue);
spin_lock(&dev_queue->lock);
@@ -188,11 +188,10 @@ static inline int qdisc_restart(struct netdev_queue *dev_queue)
void __qdisc_run(struct netdev_queue *dev_queue)
{
- struct net_device *dev = dev_queue->dev;
unsigned long start_time = jiffies;
while (qdisc_restart(dev_queue)) {
- if (netif_queue_stopped(dev))
+ if (netif_tx_queue_stopped(dev_queue))
break;
/*
diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index 8ac0598..16d975f 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -288,8 +288,7 @@ restart:
if (slave->tx_queue.qdisc_sleeping != q)
continue;
- if (netif_queue_stopped(slave) ||
- __netif_subqueue_stopped(slave, subq) ||
+ if (__netif_subqueue_stopped(slave, subq) ||
!netif_running(slave)) {
busy = 1;
continue;
@@ -298,8 +297,7 @@ restart:
switch (teql_resolve(skb, skb_res, slave)) {
case 0:
if (netif_tx_trylock(slave)) {
- if (!netif_queue_stopped(slave) &&
- !__netif_subqueue_stopped(slave, subq) &&
+ if (!__netif_subqueue_stopped(slave, subq) &&
slave->hard_start_xmit(skb, slave) == 0) {
netif_tx_unlock(slave);
master->slaves = NEXT_SLAVE(q);
--
1.5.6
--
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