diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-03-27 15:42:20 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-29 17:58:37 -0400 |
| commit | 5efeac44cfca62f66a1b2919fc8ec7f7c726d15b (patch) | |
| tree | b4d7d338f3ace293b905014afc70afc3189a89ff /net | |
| parent | 080b3c19a4ffe4677d7449880f4d0cea07182474 (diff) | |
| download | linux-0-day-5efeac44cfca62f66a1b2919fc8ec7f7c726d15b.tar.gz linux-0-day-5efeac44cfca62f66a1b2919fc8ec7f7c726d15b.tar.xz | |
netpoll: Respect NETIF_F_LLTX
Stop taking the transmit lock when a network device has specified
NETIF_F_LLTX.
If no locks needed to trasnmit a packet this is the ideal scenario for
netpoll as all packets can be trasnmitted immediately.
Even if some locks are needed in ndo_start_xmit skipping any unnecessary
serialization is desirable for netpoll as it makes it more likely a
debugging packet may be trasnmitted immediately instead of being
deferred until later.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/netpoll.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index d44af2306f235..ed7740f7a94d5 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -119,17 +119,17 @@ static void queue_process(struct work_struct *work) txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); local_irq_save(flags); - __netif_tx_lock(txq, smp_processor_id()); + HARD_TX_LOCK(dev, txq, smp_processor_id()); if (netif_xmit_frozen_or_stopped(txq) || netpoll_start_xmit(skb, dev, txq) != NETDEV_TX_OK) { skb_queue_head(&npinfo->txq, skb); - __netif_tx_unlock(txq); + HARD_TX_UNLOCK(dev, txq); local_irq_restore(flags); schedule_delayed_work(&npinfo->tx_work, HZ/10); return; } - __netif_tx_unlock(txq); + HARD_TX_UNLOCK(dev, txq); local_irq_restore(flags); } } @@ -345,11 +345,11 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb, /* try until next clock tick */ for (tries = jiffies_to_usecs(1)/USEC_PER_POLL; tries > 0; --tries) { - if (__netif_tx_trylock(txq)) { + if (HARD_TX_TRYLOCK(dev, txq)) { if (!netif_xmit_stopped(txq)) status = netpoll_start_xmit(skb, dev, txq); - __netif_tx_unlock(txq); + HARD_TX_UNLOCK(dev, txq); if (status == NETDEV_TX_OK) break; |