From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [Bugme-new] [Bug 15507] New: kernel misses 3rd part of tcp handshake (ACK), stays in SYN_RECV state Date: Fri, 19 Mar 2010 14:42:09 +0100 Message-ID: <1269006129.3048.36.camel@edumazet-laptop> References: <20100318160103.cc28c367.akpm@linux-foundation.org> <1268953951.2894.194.camel@edumazet-laptop> <4BA365BA.4040309@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Andrew Morton , netdev@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org To: Joshua Roys Return-path: Received: from mail-bw0-f209.google.com ([209.85.218.209]:46929 "EHLO mail-bw0-f209.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752411Ab0CSNmQ (ORCPT ); Fri, 19 Mar 2010 09:42:16 -0400 Received: by bwz1 with SMTP id 1so37710bwz.21 for ; Fri, 19 Mar 2010 06:42:14 -0700 (PDT) In-Reply-To: <4BA365BA.4040309@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: Le vendredi 19 mars 2010 =C3=A0 07:53 -0400, Joshua Roys a =C3=A9crit : > On 03/18/2010 07:12 PM, Eric Dumazet wrote: > > > > I would say this is expected if httpd server set DEFER_ACCEPT socke= t > > option. > > > > > > >=20 > Gah! You've got to be kidding :) If that's what it is, close the=20 > bug... and I'll go read some man-pages! >=20 So you _confirm_ DEFER_ACCEPT is not used, its _important_ for us. I dont believe my comment was trivial at all :) I gave a hint to myself and other network guys, because we did some changes in this area lately (commit b103cf34 tcp: fix TCP_DEFER_ACCEPT retrans calculation) from Julian Anastasov. git describe b103cf34 v2.6.31-9056-gb103cf3 Please boot a fresh vm, then try exactly 10 'bad connects', please make each attempt last at least 2 minutes. (you can start all these in parallel) And report : netstat -s (My FC12 copy doesnt exhibit this problem) Thanks