netdev - Re: [PATCH 3/3] pkt_sched: restore multiqueue prio scheduler

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Date:	Sat, 23 Aug 2008 01:15:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	alexander.duyck@...il.com
Cc:	jarkao2@...il.com, hadi@...erus.ca, jeffrey.t.kirsher@...el.com,
	jeff@...zik.org, netdev@...r.kernel.org,
	alexander.h.duyck@...el.com
Subject: Re: [PATCH 3/3] pkt_sched: restore multiqueue prio scheduler

From: "Alexander Duyck" <alexander.duyck@...il.com>
Date: Fri, 22 Aug 2008 18:37:51 -0700

> I thought about doing just that but then I realized that there would
> be a number of issues.
> 
> First if I just set the skb->queue_mapping for the packet without
> moving it to a qdisc dedicated to that tx queue I run into
> head-of-line issues since multiple qdiscs will stop if holding packets
> for a single tx queue that is full.  That is over come in this patch
> by the fact that each qdisc has a specific fifo per tx queue.

Such fifos could be configured using 'tc' commands just
as easily.

Look, I know what you're trying to do is possible with at
best minor tweaks.  So don't press your luck listing how
impossible it is :-)

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