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

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Date:	Fri, 18 Jul 2008 10:10:21 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	hadi@...erus.ca
Cc:	Patrick McHardy <kaber@...sh.net>,
	David Miller <davem@...emloft.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.

 > The question is whether the packets sitting on the fifo qdisc are being
 > sorted fairly when congestion kicks in. Remember there is still a single
 > wire still even on multiple rings;->

This is definitely true, but it is good to keep in mind that in the near
future we will start to see things look a little like multiple "virtual
wires."  This is because of new ethernet standards like per-priority
pause, which makes it possible that one hardware ring on a NIC can
transmit while another ring is paused (possibly because of congestion
far off in the network).

 - R.
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