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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-05-25 22:58:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-25 22:58:01 -0700 |
| commit | 08baf561083bc27a953aa087dd8a664bb2b88e8e (patch) | |
| tree | 979d92224e21b69368a27bb684b74b3d4d744183 /net/core | |
| parent | 65ac8851490ec97a96759af729132c96f925a795 (diff) | |
| download | kernel_samsung_smdk4412-08baf561083bc27a953aa087dd8a664bb2b88e8e.zip kernel_samsung_smdk4412-08baf561083bc27a953aa087dd8a664bb2b88e8e.tar.gz kernel_samsung_smdk4412-08baf561083bc27a953aa087dd8a664bb2b88e8e.tar.bz2 | |
net: txq_trans_update() helper
We would like to get rid of netdev->trans_start = jiffies; that about all net
drivers have to use in their start_xmit() function, and use txq->trans_start
instead.
This can be done generically in core network, as suggested by David.
Some devices, (particularly loopback) dont need trans_start update, because
they dont have transmit watchdog. We could add a new device flag, or rely
on fact that txq->tran_start can be updated is txq->xmit_lock_owner is
different than -1. Use a helper function to hide our choice.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 3 | ||||
| -rw-r--r-- | net/core/netpoll.c | 5 | ||||
| -rw-r--r-- | net/core/pktgen.c | 1 |
3 files changed, 8 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 241613f..5eb3e48 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1698,6 +1698,8 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, skb->dst = NULL; } rc = ops->ndo_start_xmit(skb, dev); + if (rc == 0) + txq_trans_update(txq); /* * TODO: if skb_orphan() was called by * dev->hard_start_xmit() (for example, the unmodified @@ -1727,6 +1729,7 @@ gso: skb->next = nskb; return rc; } + txq_trans_update(txq); if (unlikely(netif_tx_queue_stopped(txq) && skb->next)) return NETDEV_TX_BUSY; } while (skb->next); diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 67b4f3e..7ab31a7 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -302,8 +302,11 @@ 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(txq)) { - if (!netif_tx_queue_stopped(txq)) + if (!netif_tx_queue_stopped(txq)) { status = ops->ndo_start_xmit(skb, dev); + if (status == NETDEV_TX_OK) + txq_trans_update(txq); + } __netif_tx_unlock(txq); if (status == NETDEV_TX_OK) diff --git a/net/core/pktgen.c b/net/core/pktgen.c index 0666a82..b8ccd3c 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -3438,6 +3438,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) retry_now: ret = (*xmit)(pkt_dev->skb, odev); if (likely(ret == NETDEV_TX_OK)) { + txq_trans_update(txq); pkt_dev->last_ok = 1; pkt_dev->sofar++; pkt_dev->seq_num++; |