From efe074c2cc1c67021481f56ba87cc61d1ab03e33 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 16 Mar 2020 19:12:49 -0700 Subject: net_sched: add qdisc_watchdog_schedule_range_ns() Some packet schedulers might want to add a slack when programming hrtimers. This can reduce number of interrupts and increase batch sizes and thus give good xmit_more savings. This commit adds qdisc_watchdog_schedule_range_ns() helper, with an extra delta_ns parameter. Legacy qdisc_watchdog_schedule_n() becomes an inline passing a zero slack. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/sched/sch_api.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'net/sched') diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 50794125bf02..83984be04f57 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -618,7 +618,8 @@ void qdisc_watchdog_init(struct qdisc_watchdog *wd, struct Qdisc *qdisc) } EXPORT_SYMBOL(qdisc_watchdog_init); -void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires) +void qdisc_watchdog_schedule_range_ns(struct qdisc_watchdog *wd, u64 expires, + u64 delta_ns) { if (test_bit(__QDISC_STATE_DEACTIVATED, &qdisc_root_sleeping(wd->qdisc)->state)) @@ -628,11 +629,12 @@ void qdisc_watchdog_schedule_ns(struct qdisc_watchdog *wd, u64 expires) return; wd->last_expires = expires; - hrtimer_start(&wd->timer, - ns_to_ktime(expires), - HRTIMER_MODE_ABS_PINNED); + hrtimer_start_range_ns(&wd->timer, + ns_to_ktime(expires), + delta_ns, + HRTIMER_MODE_ABS_PINNED); } -EXPORT_SYMBOL(qdisc_watchdog_schedule_ns); +EXPORT_SYMBOL(qdisc_watchdog_schedule_range_ns); void qdisc_watchdog_cancel(struct qdisc_watchdog *wd) { -- cgit v1.2.3-70-g09d2