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| 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_drr.c | |
| parent | 79cf79abce71eb7dbc40e2f3121048ca5405cb47 (diff) | |
| download | linux-stable-22e0f8b9322cb1a48b1357e8f4ae6f5a9eca8cfa.tar.gz linux-stable-22e0f8b9322cb1a48b1357e8f4ae6f5a9eca8cfa.tar.bz2 linux-stable-22e0f8b9322cb1a48b1357e8f4ae6f5a9eca8cfa.zip | |
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_drr.c')
| -rw-r--r-- | net/sched/sch_drr.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c index d8b5ccfd248a..7a6243c5d270 100644 --- a/net/sched/sch_drr.c +++ b/net/sched/sch_drr.c @@ -88,7 +88,8 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid, if (cl != NULL) { 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) @@ -116,7 +117,7 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid, cl->qdisc = &noop_qdisc; 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) { @@ -282,7 +283,7 @@ static int drr_dump_class_stats(struct Qdisc *sch, unsigned long arg, cl->qdisc->qstats.qlen = cl->qdisc->q.qlen; } - 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; |