Subject: Re: bad networking related lag in v2.6.22-rc2

From: Patrick McHardy <[email-masked]>
Date: Thu, 24 May 2007 07:41:00 +0200

David Miller wrote:
>>* Herbert Xu <[email-masked]> wrote:
>>
>>>[NET_SCHED]: Fix qdisc_restart return value when dequeue is empty
>
> Applied, thanks everyone.

Even though it didn't fix this problem, this patch I sent earlier is
also needed.

[NET_SCHED]: sch_htb: fix event cache time calculation

The event cache time must be an absolute value, when no event exists it is
incorrectly set to 1s instead of 1s in the future.

Signed-off-by: Patrick McHardy <[email-masked]>

---
commit 49d1023ea0ea8377e740123d5954e88a00f78b7c
tree 031c210f1b5e37ade5a4fa519f5808cd49225b89
parent 637fc540b0ad22bf7971929e906e704236af06cd
author Patrick McHardy <[email-masked]> Mon, 21 May 2007 23:24:16 +0200
committer Patrick McHardy <[email-masked]> Mon, 21 May 2007 23:25:51 +0200

 net/sched/sch_htb.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 99bcec8..035788c 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -976,8 +976,9 @@ static struct sk_buff *htb_dequeue(struct Qdisc *sch)
 
 		if (q->now >= q->near_ev_cache[level]) {
 			event = htb_do_events(q, level);
-			q->near_ev_cache[level] = event ? event :
-							  PSCHED_TICKS_PER_SEC;
+			if (!event)
+				event = q->now + PSCHED_TICKS_PER_SEC;
+			q->near_ev_cache[level] = event;
 		} else
 			event = q->near_ev_cache[level];