diff options
| author | John Fastabend <john.fastabend@gmail.com> | 2014-09-28 11:52:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-30 01:02:26 -0400 |
| commit | 22e0f8b9322cb1a48b1357e8f4ae6f5a9eca8cfa (patch) | |
| tree | 2c9ef18dca9d9a441d92ea57cf7f7a292f4ceb3f /net/sched/sch_qfq.c | |
| parent | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 (diff) | |
| download | linux-22e0f8b9322cb1a48b1357e8f4ae6f5a9eca8cfa.tar.bz2 | |
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>
Diffstat (limited to 'net/sched/sch_qfq.c')
| -rw-r--r-- | net/sched/sch_qfq.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c index 602ea01a4ddd..d59f8574540a 100644 --- a/net/sched/sch_qfq.c +++ b/net/sched/sch_qfq.c @@ -459,7 +459,8 @@ static int qfq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, if (cl != NULL) { /* modify existing class */ if (tca[TCA_RATE]) { - err = gen_replace_estimator(&cl->bstats, &cl->rate_est, + err = gen_replace_estimator(&cl->bstats, NULL, + &cl->rate_est, qdisc_root_sleeping_lock(sch), tca[TCA_RATE]); if (err) @@ -484,7 +485,8 @@ static int qfq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, cl->qdisc = &noop_qdisc; if (tca[TCA_RATE]) { - err = gen_new_estimator(&cl->bstats, &cl->rate_est, + err = gen_new_estimator(&cl->bstats, NULL, + &cl->rate_est, qdisc_root_sleeping_lock(sch), tca[TCA_RATE]); if (err) @@ -667,7 +669,7 @@ static int qfq_dump_class_stats(struct Qdisc *sch, unsigned long arg, xstats.weight = cl->agg->class_weight; xstats.lmax = cl->agg->lmax; - if (gnet_stats_copy_basic(d, &cl->bstats) < 0 || + if (gnet_stats_copy_basic(d, NULL, &cl->bstats) < 0 || gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 || gnet_stats_copy_queue(d, &cl->qdisc->qstats) < 0) return -1; |