net: sched: make bstats per cpu and estimator RCU safe
authorJohn Fastabend <john.fastabend@gmail.com>
Sun, 28 Sep 2014 18:52:56 +0000 (11:52 -0700)
committerDavid S. Miller <davem@davemloft.net>
Tue, 30 Sep 2014 05:02:26 +0000 (01:02 -0400)
commit22e0f8b9322cb1a48b1357e8f4ae6f5a9eca8cfa
tree2c9ef18dca9d9a441d92ea57cf7f7a292f4ceb3f
parent79cf79abce71eb7dbc40e2f3121048ca5405cb47
net: sched: make bstats per cpu and estimator RCU safe

In order to run qdisc's without locking statistics and estimators
need to be handled correctly.

To resolve bstats make the statistics per cpu. And because this is
only needed for qdiscs that are running without locks which is not
the case for most qdiscs in the near future only create percpu
stats when qdiscs set the TCQ_F_CPUSTATS flag.

Next because estimators use the bstats to calculate packets per
second and bytes per second the estimator code paths are updated
to use the per cpu statistics.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
19 files changed:
include/net/gen_stats.h
include/net/sch_generic.h
net/core/gen_estimator.c
net/core/gen_stats.c
net/netfilter/xt_RATEEST.c
net/sched/act_api.c
net/sched/act_police.c
net/sched/sch_api.c
net/sched/sch_atm.c
net/sched/sch_cbq.c
net/sched/sch_drr.c
net/sched/sch_generic.c
net/sched/sch_hfsc.c
net/sched/sch_htb.c
net/sched/sch_mq.c
net/sched/sch_mqprio.c
net/sched/sch_multiq.c
net/sched/sch_prio.c
net/sched/sch_qfq.c