netdev - Re: [NET-NEXT PATCH 2/3][UPDATED] pkt_sched: Add multiqueue scheduler support

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Message-Id: <20080911.201940.04283963.davem@davemloft.net>
Date:	Thu, 11 Sep 2008 20:19:40 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	jeff@...zik.org, netdev@...r.kernel.org, akpm@...ux-foundation.org,
	alexander.h.duyck@...el.com
Subject: Re: [NET-NEXT PATCH 2/3][UPDATED] pkt_sched: Add multiqueue
 scheduler support

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Thu, 11 Sep 2008 20:08:31 -0700

> From: Alexander Duyck <alexander.h.duyck@...el.com>
> 
> This patch is intended to add a qdisc to support the new tx multiqueue
> architecture by providing a band for each hardware queue.  By doing
> this it is possible to support a different qdisc per physical hardware
> queue.
> 
> This qdisc uses the skb->queue_mapping to select which band to place
> the traffic onto.  It then uses a round robin w/ a check to see if the
> subqueue is stopped to determine which band to dequeue the packet from.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

I'm more and more agreeing with Jarek that the root-only restriction
is rediculious.

What if I want to do PRIO multiqueue for certain classes of traffic?

If I want to shoot myself in the foot trying to use a setup like that,
this thing damn well better let me.  You don't unilaterally know better
than the user.
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