From: "John W. Linville" <linville@tuxdriver.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>,
Albert Cahalan <acahalan@gmail.com>,
Mikael Abrahamsson <swmike@swm.pp.se>,
linux-kernel <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org
Subject: Re: txqueuelen has wrong units; should be time
Date: Mon, 28 Feb 2011 11:11:15 -0500 [thread overview]
Message-ID: <20110228161115.GB2515@tuxdriver.com> (raw)
In-Reply-To: <1298837273.8726.128.camel@edumazet-laptop>
On Sun, Feb 27, 2011 at 09:07:53PM +0100, Eric Dumazet wrote:
> Qdisc should return to caller a good indication packet is queued or
> dropped at enqueue() time... not later (aka : never)
>
> Accepting a packet at t0, and dropping it later at t0+limit without
> giving any indication to caller is a problem.
Can you elaborate on what problem this causes? Is it any worse than
if the packet is dropped at some later hop?
Is there any API that could report the drop to the sender (at
least a local one) without having to wait for the ack timeout?
Should there be?
John
--
John W. Linville Someday the world will need a hero, and you
linville@tuxdriver.com might be all we have. Be ready.
next prev parent reply other threads:[~2011-02-28 16:11 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-27 5:44 txqueuelen has wrong units; should be time Albert Cahalan
2011-02-27 7:02 ` Mikael Abrahamsson
2011-02-27 7:54 ` Eric Dumazet
2011-02-27 8:27 ` Albert Cahalan
2011-02-27 10:55 ` Jussi Kivilinna
2011-02-27 20:07 ` Eric Dumazet
2011-02-27 21:32 ` Jussi Kivilinna
2011-02-28 11:43 ` Jussi Kivilinna
2011-02-28 13:10 ` Eric Dumazet
2011-02-28 18:31 ` Jussi Kivilinna
2011-02-28 16:11 ` John W. Linville [this message]
2011-02-28 16:48 ` Eric Dumazet
2011-02-28 16:55 ` John W. Linville
2011-02-28 17:18 ` Eric Dumazet
2011-02-28 21:45 ` John Heffner
2011-03-01 4:11 ` Albert Cahalan
2011-03-01 4:18 ` David Miller
2011-03-01 6:54 ` Albert Cahalan
2011-03-01 7:25 ` David Miller
2011-03-01 7:26 ` Eric Dumazet
2011-03-01 19:37 ` Albert Cahalan
2011-03-01 20:14 ` Eric Dumazet
2011-03-01 20:16 ` Eric Dumazet
2011-03-02 3:10 ` Mikael Abrahamsson
2011-03-02 20:25 ` Chris Friesen
2011-03-01 5:01 ` Eric Dumazet
2011-03-01 5:36 ` Eric Dumazet
2011-02-27 23:33 ` Albert Cahalan
2011-02-28 11:23 ` Jussi Kivilinna
2011-03-02 21:54 ` [RFC LOL OMG] pfifo_lat: qdisc that limits dequeueing based on estimated link latency John W. Linville
2011-03-02 22:08 ` John W. Linville
2011-03-03 12:51 ` Eric Dumazet
2011-02-28 15:38 ` txqueuelen has wrong units; should be time Hagen Paul Pfeifer
2011-02-28 16:37 ` Albert Cahalan
2011-02-28 17:45 ` John W. Linville
2011-02-28 17:20 ` Bill Sommerfeld
2011-02-28 21:51 ` John Heffner
2011-03-01 0:46 ` Mikael Abrahamsson
2011-03-02 6:25 ` Stephen Hemminger
2011-03-02 6:41 ` Mikael Abrahamsson
2011-03-02 7:07 ` Stephen Hemminger
2011-03-02 16:41 ` Mikael Abrahamsson
2011-03-02 16:50 ` Eric Dumazet
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