sched: add head drop fifo queue

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This adds an additional queuing strategy, called pfifo_head_drop,
to remove the oldest skb in the case of an overflow within the queue -
the head element - instead of the last skb (tail). To remove the oldest
skb in congested situations is useful for sensor network environments
where newer packets reflect the superior information.

Reviewed-by: Florian Westphal <fw@strlen.de>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Hagen Paul Pfeifer 2010-01-24 12:30:59 +00:00 • committed by David S. Miller

parent d74340d31b

commit 57dbb2d83d

4 changed files with 55 additions and 0 deletions

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1

net/sched/sch_api.c

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34

net/sched/sch_fifo.c

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