This is a note to let you know that I've just added the patch titled
tcp: convert cached rtt from usec to jiffies when feeding initial rto
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tcp-convert-cached-rtt-from-usec-to-jiffies-when-feeding-initial-rto.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Apr 16 10:02:52 PDT 2016
From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
Date: Sun, 21 Feb 2016 10:12:39 +0300
Subject: tcp: convert cached rtt from usec to jiffies when feeding initial rto
From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
[ Upstream commit 9bdfb3b79e61c60e1a3e2dc05ad164528afa6b8a ]
Currently it's converted into msecs, thus HZ=1000 intact.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
Fixes: 740b0f1841f6 ("tcp: switch rtt estimations to usec resolution")
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/tcp_metrics.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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
Patches currently in stable-queue which might be from khlebnikov@xxxxxxxxxxxxxx are
queue-4.4/tcp-convert-cached-rtt-from-usec-to-jiffies-when-feeding-initial-rto.patch
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