tcp: tsq: add a shortcut in tcp_small_queue_check()

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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>

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Eric Dumazet 2016-12-03 11:14:54 -08:00 • committed by David S. Miller

parent a9b204d156

commit 75eefc6c59

1 changed files with 9 additions and 0 deletions

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net/ipv4/tcp_output.c

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