diff options
| author |   Paolo Abeni <pabeni@redhat.com> | 2019-04-10 14:32:39 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-04-10 12:20:46 -0700 |
| commit | 9c01c9f1f2a3ddbddbf3b233cc6bfa86f5a59af0 (patch) | |
| tree | 4e19b6073b77bf2a028579253b1ea7206763e783 /include | |
| parent | net: sched: prefer qdisc_is_empty() over direct qlen access (diff) | |
| download | linux-dev-9c01c9f1f2a3ddbddbf3b233cc6bfa86f5a59af0.tar.xz linux-dev-9c01c9f1f2a3ddbddbf3b233cc6bfa86f5a59af0.zip | |
net: sched: always do stats accounting according to TCQ_F_CPUSTATS
The core sched implementation checks independently for NOLOCK flag
to acquire/release the root spin lock and for qdisc_is_percpu_stats()
to account per CPU values in many places.
This change update the last few places checking the TCQ_F_NOLOCK to
do per CPU stats accounting according to qdisc_is_percpu_stats()
value.
The above allows to clean dev_requeue_skb() implementation a bit
and makes stats update always consistent with a single flag.
v1 -> v2:
- do not move qdisc_is_empty definition, fix build issue
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/sch_generic.h | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 7ecb6127e980..ed56474cfe3b 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -146,9 +146,14 @@ static inline bool qdisc_is_running(struct Qdisc *qdisc) return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; } +static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) +{ + return q->flags & TCQ_F_CPUSTATS; +} + static inline bool qdisc_is_empty(const struct Qdisc *qdisc) { - if (qdisc->flags & TCQ_F_NOLOCK) + if (qdisc_is_percpu_stats(qdisc)) return qdisc->empty; return !qdisc->q.qlen; } @@ -490,7 +495,7 @@ static inline u32 qdisc_qlen_sum(const struct Qdisc *q) { u32 qlen = q->qstats.qlen; - if (q->flags & TCQ_F_NOLOCK) + if (qdisc_is_percpu_stats(q)) qlen += atomic_read(&q->q.atomic_qlen); else qlen += q->q.qlen; @@ -817,11 +822,6 @@ static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, return sch->enqueue(skb, sch, to_free); } -static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) -{ - return q->flags & TCQ_F_CPUSTATS; -} - static inline void _bstats_update(struct gnet_stats_basic_packed *bstats, __u64 bytes, __u32 packets) { @@ -1113,8 +1113,13 @@ static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) if (skb) { skb = __skb_dequeue(&sch->gso_skb); - qdisc_qstats_backlog_dec(sch, skb); - sch->q.qlen--; + if (qdisc_is_percpu_stats(sch)) { + qdisc_qstats_cpu_backlog_dec(sch, skb); + qdisc_qstats_atomic_qlen_dec(sch); + } else { + qdisc_qstats_backlog_dec(sch, skb); + sch->q.qlen--; + } } else { skb = sch->dequeue(sch); } |