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Date: Thu, 3 Dec 2009 20:23:28 +0100 From: Frederic Leroy <fredo@...rox.org> To: Damian Lukowski <damian@....rwth-aachen.de> Cc: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>, Netdev <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>, Eric Dumazet <eric.dumazet@...il.com>, Herbert Xu <herbert@...dor.apana.org.au>, Greg KH <gregkh@...e.de> Subject: Re: scp stalls mysteriously Le Thu, 03 Dec 2009 15:10:11 +0100, Damian Lukowski <damian@....rwth-aachen.de> a écrit : > > 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 :-)). > > > >> 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. > > > > 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. > > I made a patch for Frederic with Codebase > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git > > Thanks for testing. I made a new .11 trace with damian patch. The copy went to the end. http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.pcap.bz2 http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.dmesg.bz2 http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.proc_net_netstat-before.bz2 http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.proc_net_netstat-after.bz2 http://www.starox.org/pub/scp_stall/scp_stall-houba.11-patch_damian.sysctl_net.ipv4.tcp-before.bz2 -- Frédéric Leroy -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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