diff options
| author | Daniel Borkmann <dborkman@redhat.com> | 2014-04-02 20:52:57 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-03 20:29:12 +0200 |
| commit | 8e2f1a63f2217365223026422a2f8ba5967051d6 (patch) | |
| tree | 617c58bd5a55d41cfe3c28e1087a17691f1ae197 /net/packet | |
| parent | packet: report tx_dropped in packet_direct_xmit (diff) | |
| download | linux-8e2f1a63f2217365223026422a2f8ba5967051d6.tar.xz linux-8e2f1a63f2217365223026422a2f8ba5967051d6.zip | |
packet: fix packet_direct_xmit for BQL enabled drivers
Currently, in packet_direct_xmit() we test the assigned netdevice queue
for netif_xmit_frozen_or_stopped() before doing an ndo_start_xmit().
This can have the side-effect that BQL enabled drivers which make use
of netdev_tx_sent_queue() internally, set __QUEUE_STATE_STACK_XOFF from
within the stack and would not fully fill the device's TX ring from
packet sockets with PACKET_QDISC_BYPASS enabled.
Instead, use a test without BQL bit so that bursts can be absorbed
into the NICs TX ring. Fix and code suggested by Eric Dumazet, thanks!
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/af_packet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index c81a9719b5b2..72e0c71fb01d 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -261,7 +261,7 @@ static int packet_direct_xmit(struct sk_buff *skb) local_bh_disable(); HARD_TX_LOCK(dev, txq, smp_processor_id()); - if (!netif_xmit_frozen_or_stopped(txq)) { + if (!netif_xmit_frozen_or_drv_stopped(txq)) { ret = ops->ndo_start_xmit(skb, dev); if (ret == NETDEV_TX_OK) txq_trans_update(txq); |