From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH v2 0/2] Tracepoint for tcp retransmission
Date: Mon, 06 Feb 2012 16:24:19 +0100
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Cc: Neil Horman <nhorman@tuxdriver.com>,
	Hagen Paul Pfeifer <hagen@jauu.net>,
	"Frank Ch. Eigler" <fche@elastic.org>,
	Satoru Moriya <satoru.moriya@hds.com>,
	David Miller <davem@davemloft.net>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"tgraf@infradead.org" <tgraf@infradead.org>,
	"stephen.hemminger@vyatta.com" <stephen.hemminger@vyatta.com>,
	Seiji Aguchi <seiji.aguchi@hds.com>, fche@sourceware.org,
	mathieu.desnoyers@polymtl.ca, rostedt@goodmis.org
To: "Frank Ch. Eigler" <fche@redhat.com>
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Le lundi 06 f=C3=A9vrier 2012 =C3=A0 10:20 -0500, Frank Ch. Eigler a =C3=
=A9crit :

> > [...] If something is needed in the short term for Satoru, I still
> > think a privately maintained module that registers a netfilter hook
> > to watch outgoing packets for retransmits offers a good solution.
>=20
> Does this mean that this netfilter hook mechanism is sufficient to
> adapt to the current/future diversity of behaviors?  Why not make
> *that* into a tracepoint then, so perf/stap scripts could get at it i=
n
> userspace?

Anyway, this netfilter module wont catch the failed retransmits (becaus=
e
of memory allocation errors or other checks done in our stack)