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Date: Fri, 6 Dec 2013 13:51:13 -0800 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Maciej Żenczykowski <maze@...gle.com>, Eric Dumazet <edumazet@...gle.com>, Stephen Hemminger <stephen@...workplumber.org>, Willem de Bruijn <willemb@...gle.com>, Yuchung Cheng <ycheng@...gle.com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 3.12 23/83] pkt_sched: fq: change classification of control packets 3.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Maciej Żenczykowski <maze@...gle.com> [ Upstream commit 2abc2f070eb30ac8421554a5c32229f8332c6206 ] Initial sch_fq implementation copied code from pfifo_fast to classify a packet as a high prio packet. This clashes with setups using PRIO with say 7 bands, as one of the band could be incorrectly (mis)classified by FQ. Packets would be queued in the 'internal' queue, and no pacing ever happen for this special queue. Fixes: afe4fd062416 ("pkt_sched: fq: Fair Queue packet scheduler") Signed-off-by: Maciej Żenczykowski <maze@...gle.com> Signed-off-by: Eric Dumazet <edumazet@...gle.com> Cc: Stephen Hemminger <stephen@...workplumber.org> Cc: Willem de Bruijn <willemb@...gle.com> Cc: Yuchung Cheng <ycheng@...gle.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- net/sched/sch_fq.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) --- a/net/sched/sch_fq.c +++ b/net/sched/sch_fq.c @@ -209,21 +209,15 @@ static void fq_gc(struct fq_sched_data * } } -static const u8 prio2band[TC_PRIO_MAX + 1] = { - 1, 2, 2, 2, 1, 2, 0, 0 , 1, 1, 1, 1, 1, 1, 1, 1 -}; - static struct fq_flow *fq_classify(struct sk_buff *skb, struct fq_sched_data *q) { struct rb_node **p, *parent; struct sock *sk = skb->sk; struct rb_root *root; struct fq_flow *f; - int band; /* warning: no starvation prevention... */ - band = prio2band[skb->priority & TC_PRIO_MAX]; - if (unlikely(band == 0)) + if (unlikely((skb->priority & TC_PRIO_MAX) == TC_PRIO_CONTROL)) return &q->internal; if (unlikely(!sk)) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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