From: Stephen Hemminger <shemminger@osdl.org>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] netpoll: rework skb transmit queue
Date: Fri, 20 Oct 2006 13:14:09 -0700 [thread overview]
Message-ID: <20061020131409.0a336a56@freekitty> (raw)
In-Reply-To: <20061020.125226.59656580.davem@davemloft.net>
On Fri, 20 Oct 2006 12:52:26 -0700 (PDT)
David Miller <davem@davemloft.net> wrote:
> From: Stephen Hemminger <shemminger@osdl.org>
> Date: Fri, 20 Oct 2006 12:25:27 -0700
>
> > Sorry, but why should we treat out-of-tree vendor code any
> > differently than out-of-tree other code.
>
> I think what netdump was trying to do, provide a way to
> requeue instead of fully drop the SKB, is quite reasonable.
> Don't you think?
Yes, but the queued vs non-queued stuff showed up out of order.
The queued messages go through the wrong Tx path. ie. they end up
going into to NIT etc, since the deferred send uses a work queue
it wouldn't work for last-gasp messages or netdump since getting
a work queue to run requires going back to scheduler and processes
running... and it should use skb_buff_head instead
of roll your own queueing.
The other alternative would be to make the send logic non-blocking
and fully push retry to the caller.
I'll make a fix to netdump, if I can find it.
--
Stephen Hemminger <shemminger@osdl.org>
next prev parent reply other threads:[~2006-10-20 20:14 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-19 17:15 [PATCH 0/3] netpoll/netconsole fixes Stephen Hemminger
2006-10-19 17:15 ` [PATCH 1/3] netpoll: initialize skb for UDP Stephen Hemminger
2006-10-20 6:58 ` David Miller
2006-10-19 17:15 ` [PATCH 2/3] netpoll: rework skb transmit queue Stephen Hemminger
2006-10-20 7:15 ` David Miller
2006-10-20 15:18 ` Stephen Hemminger
2006-10-20 19:24 ` David Miller
2006-10-20 19:25 ` Stephen Hemminger
2006-10-20 19:52 ` David Miller
2006-10-20 20:14 ` Stephen Hemminger [this message]
2006-10-20 20:25 ` Stephen Hemminger
2006-10-21 5:00 ` Dave Jones
2006-10-21 6:38 ` David Miller
2006-10-20 15:40 ` Stephen Hemminger
2006-10-20 19:27 ` David Miller
2006-10-20 19:31 ` Stephen Hemminger
2006-10-20 20:42 ` David Miller
2006-10-20 20:48 ` Stephen Hemminger
2006-10-20 21:01 ` Andi Kleen
2006-10-20 21:08 ` David Miller
2006-10-20 21:16 ` Andi Kleen
2006-10-20 21:41 ` Stephen Hemminger
2006-10-20 21:01 ` David Miller
2006-10-20 22:30 ` [PATCH 1/3] netpoll: use sk_buff_head for txq Stephen Hemminger
2006-10-23 3:42 ` David Miller
[not found] ` <20061023115337.1f636ffb@dxpl.pdx.osdl.net>
2006-10-23 19:02 ` [PATCH 4/5] netpoll: move drop hook inline Stephen Hemminger
2006-10-23 19:03 ` [PATCH 3/5] netpoll: cleanup transmit retry logic Stephen Hemminger
2006-10-23 19:02 ` [PATCH 1/5] netpoll: use sk_buff_head for txq Stephen Hemminger
2006-10-23 19:04 ` [PATCH 5/5] netpoll: interface cleanup Stephen Hemminger
2006-10-24 6:03 ` [PATCH 1/5] netpoll: use sk_buff_head for txq David Miller
2006-10-24 14:51 ` Stephen Hemminger
[not found] ` <20061023115111.0d69846e@dxpl.pdx.osdl.net>
2006-10-23 19:02 ` [PATCH 2/5] netpoll: cleanup queued transmit Stephen Hemminger
2006-10-20 22:32 ` [PATCH 2/3] netpoll: use device xmit directly Stephen Hemminger
2006-10-20 22:35 ` [PATCH 3/3] netpoll: retry logic cleanup Stephen Hemminger
2006-10-19 17:15 ` [PATCH 3/3] netpoll: use skb_buff_head for skb cache Stephen Hemminger
2006-10-20 6:57 ` [PATCH 0/3] netpoll/netconsole fixes Andrew Morton
2006-10-20 7:16 ` David Miller
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