From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic Leroy Subject: Re: scp stalls mysteriously Date: Sun, 6 Dec 2009 21:32:29 +0100 Message-ID: <20091206213229.3966c1a5@houba> References: <20091130213727.2f4047d2@houba> <20091201211945.505d3c98@houba> <20091202085925.472136e2@houba> <20091202154403.GB30730@sd-11162.dedibox.fr> <20091202183451.173db5f2@houba> <4B16BD58.3040802@tvk.rwth-aachen.de> <20091203085933.GD30730@sd-11162.dedibox.fr> <4B17A791.80808@tvk.rwth-aachen.de> <4B17C6C3.1060000@tvk.rwth-aachen.de> <20091203202328.62d7551a@houba> <4B1ADF79.6000101@tvk.rwth-aachen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Ilpo =?UTF-8?B?SsOkcnZpbmVu?= , Netdev , David Miller , Eric Dumazet , Herbert Xu , Greg KH To: Damian Lukowski Return-path: Received: from sd-11162.dedibox.fr ([88.191.70.230]:39546 "EHLO sd-11162.dedibox.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757884AbZLFUcs convert rfc822-to-8bit (ORCPT ); Sun, 6 Dec 2009 15:32:48 -0500 In-Reply-To: <4B1ADF79.6000101@tvk.rwth-aachen.de> Sender: netdev-owner@vger.kernel.org List-ID: Le Sat, 05 Dec 2009 23:32:25 +0100, Damian Lukowski a =C3=A9crit : > > Could you please make another test and unplug the cable or drop ACKs > for several seconds, so that some RTO retransmissions are performed? > I'd like to see if retrans_stamp remains constant. In the dmesg > output of the 11th run, it seems to change while icsk_retransmits > also increases. This is kind of bad for connection timeout > calculation in the RTO case ... =2E17 is online :) I disconnected physically the stream 2 times. The first was maybe too short and recover immediatly. The second disconnect is longer and took several second to recover. I hope this help ! --=20 =46r=C3=A9d=C3=A9ric Leroy