net_sched: TCQ_F_CAN_BYPASS generalization
authorEric Dumazet <eric.dumazet@gmail.com>
Sat, 22 Jan 2011 00:26:09 +0000 (16:26 -0800)
committerDavid S. Miller <davem@davemloft.net>
Sat, 22 Jan 2011 00:26:09 +0000 (16:26 -0800)
commit23624935e0c4b04730ed8d7d21f0cd25b2c2cda1
tree3fedc885d6bcd72c94fc239ae2ef98937f77c722
parentbb134d2298b49f50cf6d9388410fba96272905dc
net_sched: TCQ_F_CAN_BYPASS generalization

Now qdisc stab is handled before TCQ_F_CAN_BYPASS test in
__dev_xmit_skb(), we can generalize TCQ_F_CAN_BYPASS to other qdiscs
than pfifo_fast : pfifo, bfifo, pfifo_head_drop and sfq

SFQ is special because it can have external classifiers, and in these
cases, we cannot bypass queue discipline (packet could be dropped by
classifier) without admin asking it, or further changes.

Its worth doing this, especially for SFQ, avoiding dirtying memory in
case no packets are already waiting in queue.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sched/sch_fifo.c
net/sched/sch_generic.c
net/sched/sch_mq.c
net/sched/sch_mqprio.c
net/sched/sch_sfq.c