netdev - Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in RCU.

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Message-Id: <20080720.102534.246150854.davem@davemloft.net>
Date:	Sun, 20 Jul 2008 10:25:34 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hadi@...erus.ca
Cc:	kaber@...sh.net, netdev@...r.kernel.org, johannes@...solutions.net,
	linux-wireless@...r.kernel.org
Subject: Re: [PATCH 20/31]: pkt_sched: Perform bulk of qdisc destruction in
 RCU.

From: jamal <hadi@...erus.ca>
Date: Sun, 20 Jul 2008 11:16:03 -0400

> IMO, in the case of multiple hardware queues per physical wire,
> and such a netdevice already has a built-in hardware scheduler (they all
> seem to have this feature) then if we can feed the hardware queues
> directly, theres no need for any intermediate buffer(s).
> In such a case, to compare with qdisc arch, its like the root qdisc is
> in hardware.

They tend to implement round-robin or some similar fairness algorithm
amongst the queues, with zero concern about packet priorities.

It really is just like a bunch of queues to the phsyical layer,
fairly shared.

These things are built for parallelization, not prioritization.
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