tcp: refine tcp_tso_should_defer() after EDT adoption

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tcp_tso_should_defer() last step tries to check if the probable
next ACK packet is coming in less than half rtt.

Problem is that the head->tstamp might be in the future,
so we need to use signed arithmetics to avoid overflows.

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

...

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Eric Dumazet 2018-11-11 06:41:30 -08:00 • committed by David S. Miller

parent 1c09f7d073

commit f1c6ea3827

1 changed files with 4 additions and 3 deletions

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net/ipv4/tcp_output.c

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