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Date: Tue, 22 Mar 2016 10:40:53 +0000 From: Luis Henriques <luis.henriques@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>, "David S. Miller" <davem@...emloft.net>, Luis Henriques <luis.henriques@...onical.com> Subject: [PATCH 3.16.y-ckt 124/142] tcp: convert cached rtt from usec to jiffies when feeding initial rto 3.16.7-ckt26 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru> commit 9bdfb3b79e61c60e1a3e2dc05ad164528afa6b8a upstream. Currently it's converted into msecs, thus HZ=1000 intact. Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru> Fixes: 740b0f1841f6 ("tcp: switch rtt estimations to usec resolution") Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Luis Henriques <luis.henriques@...onical.com> --- net/ipv4/tcp_metrics.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c index 4fe041805989..600add256464 100644 --- a/net/ipv4/tcp_metrics.c +++ b/net/ipv4/tcp_metrics.c @@ -550,7 +550,7 @@ reset: */ if (crtt > tp->srtt_us) { /* Set RTO like tcp_rtt_estimator(), but from cached RTT. */ - crtt /= 8 * USEC_PER_MSEC; + crtt /= 8 * USEC_PER_SEC / HZ; inet_csk(sk)->icsk_rto = crtt + max(2 * crtt, tcp_rto_min(sk)); } else if (tp->srtt_us == 0) { /* RFC6298: 5.7 We've failed to get a valid RTT sample from
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