net: sched: pfifo_fast use skb_array

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This converts the pfifo_fast qdisc to use the skb_array data structure
and set the lockless qdisc bit. pfifo_fast is the first qdisc to support
the lockless bit that can be a child of a qdisc requiring locking. So
we add logic to clear the lock bit on initialization in these cases when
the qdisc graft operation occurs.

This also removes the logic used to pick the next band to dequeue from
and instead just checks a per priority array for packets from top priority
to lowest. This might need to be a bit more clever but seems to work
for now.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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John Fastabend 2017-12-07 09:58:19 -08:00 • committed by David S. Miller

parent 4a86a4cf68

commit c5ad119fb6

2 changed files with 92 additions and 53 deletions

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5

net/sched/sch_api.c

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138

net/sched/sch_generic.c

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