From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhu Yi Subject: [PATCH V3 2/8] tcp: use limited socket backlog Date: Fri, 5 Mar 2010 12:01:41 +0800 Message-ID: <1267761707-15605-2-git-send-email-yi.zhu@intel.com> References: <1267761707-15605-1-git-send-email-yi.zhu@intel.com> Cc: netdev@vger.kernel.org, Zhu Yi , Alexey Kuznetsov , "Pekka Savola (ipv6)" , Patrick McHardy To: davem@davemloft.net Return-path: Received: from mga14.intel.com ([143.182.124.37]:27263 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752248Ab0CEEA2 (ORCPT ); Thu, 4 Mar 2010 23:00:28 -0500 In-Reply-To: <1267761707-15605-1-git-send-email-yi.zhu@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: Make tcp adapt to the limited socket backlog change. Cc: "David S. Miller" Cc: Alexey Kuznetsov Cc: "Pekka Savola (ipv6)" Cc: Patrick McHardy Signed-off-by: Zhu Yi --- net/ipv4/tcp_ipv4.c | 6 ++++-- net/ipv6/tcp_ipv6.c | 6 ++++-- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index c3588b4..4baf194 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1682,8 +1682,10 @@ process: if (!tcp_prequeue(sk, skb)) ret = tcp_v4_do_rcv(sk, skb); } - } else - sk_add_backlog(sk, skb); + } else if (sk_add_backlog_limited(sk, skb)) { + bh_unlock_sock(sk); + goto discard_and_relse; + } bh_unlock_sock(sk); sock_put(sk); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 6963a6b..c4ea9d5 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1740,8 +1740,10 @@ process: if (!tcp_prequeue(sk, skb)) ret = tcp_v6_do_rcv(sk, skb); } - } else - sk_add_backlog(sk, skb); + } else if (sk_add_backlog_limited(sk, skb)) { + bh_unlock_sock(sk); + goto discard_and_relse; + } bh_unlock_sock(sk); sock_put(sk); -- 1.6.3.3