Messages in this thread Patch in this message | | | From | Artem Savkov <> | Subject | [PATCH v3 2/2] net: make tcp keepalive timer upper bound | Date | Wed, 30 Mar 2022 10:20:46 +0200 |
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Make sure TCP keepalive timer does not expire late. Switching to upper bound timers means it can fire off early but in case of keepalive tcp_keepalive_timer() handler checks elapsed time and resets the timer if it was triggered early. This results in timer "cascading" to a higher precision and being just a couple of milliseconds off it's original mark.
Signed-off-by: Artem Savkov <asavkov@redhat.com> --- net/ipv4/inet_connection_sock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 1e5b53c2bb267..bb2dbfb6f5b50 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -589,7 +589,7 @@ EXPORT_SYMBOL(inet_csk_delete_keepalive_timer); void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long len) { - sk_reset_timer(sk, &sk->sk_timer, jiffies + len); + sk_reset_timer(sk, &sk->sk_timer, jiffies + upper_bound_timeout(len)); } EXPORT_SYMBOL(inet_csk_reset_keepalive_timer); -- 2.34.1
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