tcp: use tp->tcp_mstamp in output path

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Idea is to later convert tp->tcp_mstamp to a full u64 counter
using usec resolution, so that we can later have fine
grained TCP TS clock (RFC 7323), regardless of HZ value.

We try to refresh tp->tcp_mstamp only when necessary.

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

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Eric Dumazet 2017-05-16 14:00:00 -07:00 • committed by David S. Miller

parent 9d4f97f97b

commit 385e20706f

4 changed files with 14 additions and 12 deletions

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1

net/ipv4/tcp_ipv4.c

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21

net/ipv4/tcp_output.c

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1

net/ipv4/tcp_recovery.c

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3

net/ipv4/tcp_timer.c

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