From: jamal <hadi@cyberus.ca>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Patrick McHardy <kaber@trash.net>,
"Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@intel.com>,
davem@davemloft.net, netdev@vger.kernel.org, jeff@garzik.org,
"Kok, Auke-jan H" <auke-jan.h.kok@intel.com>
Subject: Re: [PATCH] NET: Multiqueue network device support.
Date: Tue, 12 Jun 2007 08:17:42 -0400 [thread overview]
Message-ID: <1181650662.4060.72.camel@localhost> (raw)
In-Reply-To: <1181639998.29767.59.camel@johannes.berg>
On Tue, 2007-12-06 at 11:19 +0200, Johannes Berg wrote:
> On Mon, 2007-06-11 at 08:23 -0400, jamal wrote:
> > Sure. Packets stashed on the any DMA ring are considered "gone to the
> > wire". That is a very valid assumption to make.
>
> Not at all! Packets could be on the DMA queue forever if you're feeding
> out more packets. Heck, on most wireless hardware packets can even be
> *expired* from the DMA queue and you get an indication that it was
> impossible to send them.
The spirit of the discussion you are quoting was much higher level than
that. Yes what you describe can happen on any DMA (to hard-disk etc)
A simpler example, if you tcpdump on an outgoing packet you see it on
its way to the driver - it is accounted for as "gone"[1].
In any case, read the rest of the thread.
cheers,
jamal
[1] Current Linux tcpdumping is not that accurate, but i dont wanna go
into that discussion
next prev parent reply other threads:[~2007-06-12 12:17 UTC|newest]
Thread overview: 153+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-04 21:40 [RFC] NET: Multiple queue hardware support PJ Waskiewicz
2007-06-04 21:40 ` [PATCH] NET: Multiqueue network device support PJ Waskiewicz
2007-06-05 11:50 ` jamal
2007-06-05 15:51 ` Waskiewicz Jr, Peter P
2007-06-05 22:28 ` jamal
2007-06-06 15:11 ` Patrick McHardy
2007-06-06 22:13 ` jamal
2007-06-06 22:30 ` Waskiewicz Jr, Peter P
2007-06-06 22:40 ` David Miller
2007-06-06 23:35 ` jamal
2007-06-06 23:56 ` David Miller
2007-06-07 16:08 ` Stephen Hemminger
2007-06-07 16:59 ` Waskiewicz Jr, Peter P
2007-06-11 12:08 ` Patrick McHardy
2007-06-07 22:04 ` jamal
2007-06-09 14:58 ` Leonid Grossman
2007-06-09 19:23 ` jamal
2007-06-09 21:23 ` Leonid Grossman
2007-06-09 22:14 ` Jeff Garzik
2007-06-10 3:02 ` jamal
2007-06-10 15:27 ` Leonid Grossman
2007-06-06 22:35 ` David Miller
2007-06-06 22:57 ` Waskiewicz Jr, Peter P
2007-06-06 23:00 ` David Miller
2007-06-06 23:14 ` Waskiewicz Jr, Peter P
2007-06-06 23:36 ` Jeff Garzik
2007-06-06 23:32 ` jamal
2007-06-06 23:48 ` Rick Jones
2007-06-06 23:54 ` jamal
2007-06-07 0:01 ` David Miller
2007-06-06 23:58 ` David Miller
2007-06-06 23:52 ` David Miller
2007-06-07 0:47 ` Jeff Garzik
2007-06-07 12:29 ` jamal
2007-06-07 15:03 ` Kok, Auke
2007-06-07 21:57 ` jamal
2007-06-07 22:06 ` Kok, Auke
2007-06-07 22:26 ` jamal
2007-06-07 22:30 ` Kok, Auke
2007-06-07 22:57 ` jamal
2007-06-07 22:44 ` David Miller
2007-06-07 22:54 ` jamal
2007-06-07 23:00 ` David Miller
2007-06-07 23:03 ` jamal
2007-06-08 0:31 ` Sridhar Samudrala
2007-06-08 1:35 ` jamal
2007-06-08 10:39 ` Herbert Xu
2007-06-08 11:34 ` jamal
2007-06-08 12:37 ` Herbert Xu
2007-06-08 13:12 ` jamal
2007-06-09 11:08 ` Herbert Xu
2007-06-09 14:36 ` jamal
2007-06-08 5:32 ` Krishna Kumar2
2007-06-08 19:55 ` Waskiewicz Jr, Peter P
2007-06-09 0:24 ` jamal
2007-06-07 22:55 ` Waskiewicz Jr, Peter P
2007-06-09 1:05 ` Ramkrishna Vepa
2007-06-06 23:53 ` David Miller
2007-06-07 1:08 ` jamal
2007-06-07 12:22 ` jamal
2007-06-11 12:01 ` Patrick McHardy
2007-06-11 11:58 ` Patrick McHardy
2007-06-11 12:23 ` jamal
2007-06-11 12:39 ` Patrick McHardy
2007-06-11 12:52 ` jamal
2007-06-11 13:03 ` Patrick McHardy
2007-06-11 13:29 ` jamal
2007-06-11 14:03 ` Patrick McHardy
2007-06-11 14:30 ` Cohen, Guy
2007-06-11 14:38 ` Patrick McHardy
2007-06-11 14:48 ` jamal
2007-06-11 15:00 ` Tomas Winkler
2007-06-11 15:14 ` jamal
2007-06-11 15:34 ` Cohen, Guy
2007-06-11 22:22 ` jamal
2007-06-12 14:04 ` Cohen, Guy
2007-06-12 15:23 ` jamal
2007-06-12 23:38 ` jamal
2007-06-11 14:40 ` jamal
2007-06-11 14:49 ` Patrick McHardy
2007-06-11 15:05 ` jamal
2007-06-11 15:12 ` Patrick McHardy
2007-06-11 15:25 ` jamal
2007-06-11 15:44 ` Patrick McHardy
2007-06-11 21:35 ` jamal
2007-06-11 23:01 ` Patrick McHardy
2007-06-12 0:58 ` Patrick McHardy
2007-06-12 2:29 ` jamal
2007-06-12 13:21 ` Patrick McHardy
2007-06-12 15:12 ` jamal
2007-06-12 21:02 ` David Miller
2007-06-12 21:13 ` Jeff Garzik
2007-06-12 21:17 ` Ben Greear
2007-06-12 21:26 ` David Miller
2007-06-12 21:46 ` Jeff Garzik
2007-06-12 21:52 ` Roland Dreier
2007-06-12 21:59 ` Jeff Garzik
2007-06-12 22:04 ` David Miller
2007-06-12 22:18 ` Jeff Garzik
2007-06-12 22:00 ` David Miller
2007-06-12 21:53 ` David Miller
2007-06-12 22:01 ` Jeff Garzik
2007-06-12 21:46 ` Ben Greear
2007-06-12 21:54 ` David Miller
2007-06-12 22:30 ` Jeff Garzik
2007-06-12 22:40 ` Ben Greear
2007-06-12 21:47 ` Jason Lunz
2007-06-12 21:55 ` David Miller
2007-06-12 22:17 ` Jason Lunz
2007-06-13 3:41 ` Leonid Grossman
2007-06-13 16:44 ` Rick Jones
2007-06-12 21:17 ` Patrick McHardy
2007-06-13 5:56 ` Zhu Yi
2007-06-13 11:34 ` Patrick McHardy
2007-06-14 1:51 ` Zhu Yi
2007-06-13 12:32 ` jamal
2007-06-13 13:12 ` Robert Olsson
2007-06-13 13:33 ` jamal
2007-06-13 15:01 ` Leonid Grossman
2007-06-13 15:53 ` Robert Olsson
2007-06-13 18:20 ` David Miller
2007-06-13 18:22 ` Waskiewicz Jr, Peter P
2007-06-13 21:30 ` jamal
2007-06-14 2:44 ` Zhu Yi
2007-06-14 11:48 ` jamal
2007-06-15 1:27 ` Zhu Yi
2007-06-15 10:49 ` jamal
2007-06-18 1:18 ` Zhu Yi
2007-06-18 15:16 ` jamal
2007-06-19 2:12 ` Zhu Yi
2007-06-19 16:04 ` jamal
2007-06-20 5:51 ` Zhu Yi
2007-06-21 15:39 ` jamal
2007-06-22 1:26 ` Zhu Yi
2007-06-25 16:47 ` jamal
2007-06-25 20:47 ` David Miller
2007-06-26 13:27 ` jamal
2007-06-26 20:57 ` David Miller
2007-06-27 22:32 ` jamal
2007-06-27 22:54 ` David Miller
2007-06-28 0:15 ` jamal
2007-06-28 0:31 ` David Miller
2007-06-12 9:19 ` Johannes Berg
2007-06-12 12:17 ` jamal [this message]
2007-06-11 17:36 ` Patrick McHardy
2007-06-11 18:05 ` Waskiewicz Jr, Peter P
2007-06-11 18:07 ` Patrick McHardy
2007-06-13 18:34 ` Waskiewicz Jr, Peter P
2007-06-11 17:52 ` Patrick McHardy
2007-06-11 17:57 ` Waskiewicz Jr, Peter P
2007-06-11 18:05 ` Patrick McHardy
2007-06-11 18:15 ` Waskiewicz Jr, Peter P
2007-06-11 18:24 ` Patrick McHardy
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