From mboxrd@z Thu Jan  1 00:00:00 1970
From: Frederic Leroy <fredo@starox.org>
Subject: Re: scp stalls mysteriously
Date: Thu, 3 Dec 2009 20:23:28 +0100
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Cc: Ilpo =?UTF-8?B?SsOkcnZpbmVu?= <ilpo.jarvinen@helsinki.fi>,
	Netdev <netdev@vger.kernel.org>,
	David Miller <davem@davemloft.net>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Greg KH <gregkh@suse.de>
To: Damian Lukowski <damian@tvk.rwth-aachen.de>
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Le Thu, 03 Dec 2009 15:10:11 +0100,
Damian Lukowski <damian@tvk.rwth-aachen.de> a =C3=A9crit :
> > I suppose adding || !tp->retrans_stamp into the false condition is
> > fine as long as we don't then have a connection that can cause a
> > connection to hang there forever for some reason (this needs to be
> > understood well enough, not just test driven in stables :-)).
> >=20
> >> Unluckily, I still cannot reproduce the scp stalls here, so it
> >> would be nice if Frederic printed retrans_stamp together with
> >> icsk_ca_state and icsk_retransmits, please.
> >=20
> > It wouldn't hurt to know tp->packets_out and tp->retrans_out too,
> > that might have some significant w.r.t what happens because of FRTO=
=2E
>=20
> I made a patch for Frederic with Codebase
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>=20
> Thanks for testing.

I made a new .11 trace with damian patch.
The copy went to the end.=20

http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.pca=
p.bz2
http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.dme=
sg.bz2
http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.pro=
c_net_netstat-before.bz2
http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.pro=
c_net_netstat-after.bz2
http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.sys=
ctl_net.ipv4.tcp-before.bz2

--=20
=46r=C3=A9d=C3=A9ric Leroy