Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754780AbaJMCvT (ORCPT ); Sun, 12 Oct 2014 22:51:19 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:45798 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753102AbaJMC1c (ORCPT ); Sun, 12 Oct 2014 22:27:32 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Per Hurtig , Eric Dumazet , Nandita Dukkipati , Neal Cardwell , "David S. Miller" Subject: [PATCH 3.14 31/37] tcp: fixing TLPs FIN recovery Date: Mon, 13 Oct 2014 04:24:28 +0200 Message-Id: <20141013022401.584919904@linuxfoundation.org> X-Mailer: git-send-email 2.1.2 In-Reply-To: <20141013022400.286360067@linuxfoundation.org> References: <20141013022400.286360067@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Per Hurtig [ Upstream commit bef1909ee3ed1ca39231b260a8d3b4544ecd0c8f ] Fix to a problem observed when losing a FIN segment that does not contain data. In such situations, TLP is unable to recover from *any* tail loss and instead adds at least PTO ms to the retransmission process, i.e., RTO = RTO + PTO. Signed-off-by: Per Hurtig Signed-off-by: Eric Dumazet Acked-by: Nandita Dukkipati Acked-by: Neal Cardwell Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/tcp_output.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2069,9 +2069,7 @@ void tcp_send_loss_probe(struct sock *sk if (WARN_ON(!skb || !tcp_skb_pcount(skb))) goto rearm_timer; - /* Probe with zero data doesn't trigger fast recovery. */ - if (skb->len > 0) - err = __tcp_retransmit_skb(sk, skb); + err = __tcp_retransmit_skb(sk, skb); /* Record snd_nxt for loss detection. */ if (likely(!err)) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/