Re: [PATCH net-next-2.6 v3] net_sched: SFB flow scheduler

On Wed, 23 Feb 2011 16:14:51 +0100
Eric Dumazet [off-list ref] wrote:

1) SFB default child qdisc is pfifo_fast. It can be changed by another
qdisc but a child qdisc MUST not drop a packet previously queued. This
is because SFB needs to handle a dequeued packet in order to maintain
its virtual queue states. pfifo_head_drop or CHOKe should not be used.

Why not add a flag field to Qdisc_ops and to mark qdisc's that
are (or not) work conserving?

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