From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: [PATCH 2/2]: pkt_sched: Convert CBQ to tasklet_hrtimer. Date: Fri, 21 Aug 2009 17:03:33 -0700 (PDT) Message-ID: <20090821.170333.153413841.davem@davemloft.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: tglx@linutronix.de To: netdev@vger.kernel.org Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:46049 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755624AbZHVADV (ORCPT ); Fri, 21 Aug 2009 20:03:21 -0400 Sender: netdev-owner@vger.kernel.org List-ID: This code expects to run in softirq context, and bare hrtimers run in hw IRQ context. Signed-off-by: David S. Miller --- net/sched/sch_cbq.c | 23 +++++++++++++---------- 1 files changed, 13 insertions(+), 10 deletions(-) diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c index d5798e1..81652d6 100644 --- a/net/sched/sch_cbq.c +++ b/net/sched/sch_cbq.c @@ -163,7 +163,7 @@ struct cbq_sched_data psched_time_t now_rt; /* Cached real time */ unsigned pmask; - struct hrtimer delay_timer; + struct tasklet_hrtimer delay_timer; struct qdisc_watchdog watchdog; /* Watchdog timer, started when CBQ has backlog, but cannot @@ -503,6 +503,8 @@ static void cbq_ovl_delay(struct cbq_class *cl) cl->undertime = q->now + delay; if (delay > 0) { + struct hrtimer *ht; + sched += delay + cl->penalty; cl->penalized = sched; cl->cpriority = TC_CBQ_MAXPRIO; @@ -510,12 +512,12 @@ static void cbq_ovl_delay(struct cbq_class *cl) expires = ktime_set(0, 0); expires = ktime_add_ns(expires, PSCHED_TICKS2NS(sched)); - if (hrtimer_try_to_cancel(&q->delay_timer) && - ktime_to_ns(ktime_sub( - hrtimer_get_expires(&q->delay_timer), - expires)) > 0) - hrtimer_set_expires(&q->delay_timer, expires); - hrtimer_restart(&q->delay_timer); + ht = &q->delay_timer.timer; + if (hrtimer_try_to_cancel(ht) && + ktime_to_ns(ktime_sub(hrtimer_get_expires(ht), + expires)) > 0) + hrtimer_set_expires(ht, expires); + hrtimer_restart(ht); cl->delayed = 1; cl->xstats.overactions++; return; @@ -621,7 +623,7 @@ static enum hrtimer_restart cbq_undelay(struct hrtimer *timer) time = ktime_set(0, 0); time = ktime_add_ns(time, PSCHED_TICKS2NS(now + delay)); - hrtimer_start(&q->delay_timer, time, HRTIMER_MODE_ABS); + tasklet_hrtimer_start(&q->delay_timer, time, HRTIMER_MODE_ABS); } sch->flags &= ~TCQ_F_THROTTLED; @@ -1214,7 +1216,7 @@ cbq_reset(struct Qdisc* sch) q->tx_class = NULL; q->tx_borrowed = NULL; qdisc_watchdog_cancel(&q->watchdog); - hrtimer_cancel(&q->delay_timer); + tasklet_hrtimer_cancel(&q->delay_timer); q->toplevel = TC_CBQ_MAXLEVEL; q->now = psched_get_time(); q->now_rt = q->now; @@ -1397,7 +1399,8 @@ static int cbq_init(struct Qdisc *sch, struct nlattr *opt) q->link.minidle = -0x7FFFFFFF; qdisc_watchdog_init(&q->watchdog, sch); - hrtimer_init(&q->delay_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + tasklet_hrtimer_init(&q->delay_timer, cbq_undelay, + CLOCK_MONOTONIC, HRTIMER_MODE_ABS); q->delay_timer.function = cbq_undelay; q->toplevel = TC_CBQ_MAXLEVEL; q->now = psched_get_time(); -- 1.6.3.4