diff options
| author |   Hagen Paul Pfeifer <hagen@jauu.net> | 2010-01-24 12:30:59 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-01-28 21:27:00 -0800 |
| commit | 57dbb2d83d100ea601c54fe129bfde0678db5dee (patch) | |
| tree | 40305bcd986692f512b1b5e848c0b0f612968c6a /include/net/pkt_sched.h | |
| parent | netns xfrm: ipcomp6 support (diff) | |
| download | linux-dev-57dbb2d83d100ea601c54fe129bfde0678db5dee.tar.xz linux-dev-57dbb2d83d100ea601c54fe129bfde0678db5dee.zip | |
sched: add head drop fifo queue
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>
Diffstat (limited to 'include/net/pkt_sched.h')
| -rw-r--r-- | include/net/pkt_sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/pkt_sched.h b/include/net/pkt_sched.h index 2d567265363e..b6cdc33b39c1 100644 --- a/include/net/pkt_sched.h +++ b/include/net/pkt_sched.h @@ -71,6 +71,7 @@ extern void qdisc_watchdog_cancel(struct qdisc_watchdog *wd); extern struct Qdisc_ops pfifo_qdisc_ops; extern struct Qdisc_ops bfifo_qdisc_ops; +extern struct Qdisc_ops pfifo_head_drop_qdisc_ops; extern int fifo_set_limit(struct Qdisc *q, unsigned int limit); extern struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops, |