tcp: switch pacing timer to softirq based hrtimer

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linux-4.16 got support for softirq based hrtimers.
TCP can switch its pacing hrtimer to this variant, since this
avoids going through a tasklet and some atomic operations.

pacing timer logic looks like other (jiffies based) tcp timers.

v2: use hrtimer_try_to_cancel() in tcp_clear_xmit_timers()
    to correctly release reference on socket if needed.

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

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Eric Dumazet 2018-05-10 14:59:43 -07:00 • committed by David S. Miller

parent 4cbd7a7d3c

commit 73a6bab5aa

3 changed files with 29 additions and 46 deletions

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4

include/net/tcp.h

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