* [PATCH] tcp: convert cached rtt from usec to jiffies when feeding initial rto
@ 2016-02-21 7:12 Konstantin Khlebnikov
2016-02-23 23:33 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Konstantin Khlebnikov @ 2016-02-21 7:12 UTC (permalink / raw)
To: netdev, Eric Dumazet, David S. Miller
Currently it's converted into msecs, thus HZ=1000 intact.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 740b0f1841f6 ("tcp: switch rtt estimations to usec resolution")
---
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 c8cbc2b4b792..a726d7853ce5 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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] tcp: convert cached rtt from usec to jiffies when feeding initial rto
2016-02-21 7:12 [PATCH] tcp: convert cached rtt from usec to jiffies when feeding initial rto Konstantin Khlebnikov
@ 2016-02-23 23:33 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2016-02-23 23:33 UTC (permalink / raw)
To: khlebnikov; +Cc: netdev, edumazet
From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Date: Sun, 21 Feb 2016 10:12:39 +0300
> Currently it's converted into msecs, thus HZ=1000 intact.
>
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
> Fixes: 740b0f1841f6 ("tcp: switch rtt estimations to usec resolution")
Applied and queued up for -stable, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-02-21 7:12 [PATCH] tcp: convert cached rtt from usec to jiffies when feeding initial rto Konstantin Khlebnikov
2016-02-23 23:33 ` David Miller
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