tree a85542ee234e7b9fe4f6a4a1837d4a99139c7e73
parent 03a9a447d2dab755b22df79b5e205fdbb9b2c851
author Krishna Kumar <krkumar2@in.ibm.com> 1251696028 -0700
committer David S. Miller <davem@davemloft.net> 1251696028 -0700

pkt_sched: Fix resource limiting in pfifo_fast

pfifo_fast_enqueue has this check:
        if (skb_queue_len(list) < qdisc_dev(qdisc)->tx_queue_len) {

which allows each band to enqueue upto tx_queue_len skbs for a
total of 3*tx_queue_len skbs. I am not sure if this was the
intention of limiting in qdisc.

Patch compiled and 32 simultaneous netperf testing ran fine. Also:
# tc -s qdisc show dev eth2
qdisc pfifo_fast 0: root bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
 Sent 16835026752 bytes 373116 pkt (dropped 0, overlimits 0 requeues 25) 
 rate 0bit 0pps backlog 0b 0p requeues 25 

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>