tree f5559676f497c4e30b71f58e9df43a944da88641
parent a9b204d1564702b704ad6fe74f10a102c7b87ba3
author Eric Dumazet <edumazet@google.com> 1480792494 -0800
committer David S. Miller <davem@davemloft.net> 1480962743 -0500

tcp: tsq: add a shortcut in tcp_small_queue_check()

Always allow the two first skbs in write queue to be sent,
regardless of sk_wmem_alloc/sk_pacing_rate values.

This helps a lot in situations where TX completions are delayed either
because of driver latencies or softirq latencies.

Test is done with no cache line misses.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>