diff options
Diffstat (limited to 'target/linux/generic/hack-5.4/662-remove_pfifo_fast.patch')
| -rw-r--r-- | target/linux/generic/hack-5.4/662-remove_pfifo_fast.patch | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/target/linux/generic/hack-5.4/662-remove_pfifo_fast.patch b/target/linux/generic/hack-5.4/662-remove_pfifo_fast.patch index 27946f8cec..9df3a8258d 100644 --- a/target/linux/generic/hack-5.4/662-remove_pfifo_fast.patch +++ b/target/linux/generic/hack-5.4/662-remove_pfifo_fast.patch @@ -10,7 +10,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name> --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c -@@ -595,211 +595,6 @@ struct Qdisc_ops noqueue_qdisc_ops __rea +@@ -620,230 +620,6 @@ struct Qdisc_ops noqueue_qdisc_ops __rea .owner = THIS_MODULE, }; @@ -64,8 +64,10 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name> -{ - struct pfifo_fast_priv *priv = qdisc_priv(qdisc); - struct sk_buff *skb = NULL; +- bool need_retry = true; - int band; - +-retry: - for (band = 0; band < PFIFO_FAST_BANDS && !skb; band++) { - struct skb_array *q = band2list(priv, band); - @@ -76,6 +78,23 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name> - } - if (likely(skb)) { - qdisc_update_stats_at_dequeue(qdisc, skb); +- } else if (need_retry && +- test_bit(__QDISC_STATE_MISSED, &qdisc->state)) { +- /* Delay clearing the STATE_MISSED here to reduce +- * the overhead of the second spin_trylock() in +- * qdisc_run_begin() and __netif_schedule() calling +- * in qdisc_run_end(). +- */ +- clear_bit(__QDISC_STATE_MISSED, &qdisc->state); +- +- /* Make sure dequeuing happens after clearing +- * STATE_MISSED. +- */ +- smp_mb__after_atomic(); +- +- need_retry = false; +- +- goto retry; - } else { - WRITE_ONCE(qdisc->empty, true); - } |