From: Jarek Poplawski <jarkao2@gmail•com>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: David Miller <davem@davemloft•net>,
netdev <netdev@vger•kernel.org>,
Patrick McHardy <kaber@trash•net>
Subject: Re: [PATCH net-next-2.6] net_sched: sch_sfq: add backlog info in sfq_dump_class_stats()
Date: Thu, 16 Dec 2010 13:09:34 +0000 [thread overview]
Message-ID: <20101216130934.GA7766@ff.dom.local> (raw)
In-Reply-To: <1292497384.2883.89.camel@edumazet-laptop>
On Thu, Dec 16, 2010 at 12:03:04PM +0100, Eric Dumazet wrote:
> Le jeudi 16 décembre 2010 ?? 08:16 +0000, Jarek Poplawski a écrit :
> > On 2010-12-15 19:18, Eric Dumazet wrote:
> > > We currently return for each active SFQ slot the number of packets in
> > > queue. We can also give number of bytes accounted for these packets.
...
> > > Signed-off-by: Eric Dumazet <eric.dumazet@gmail•com>
> > > ---
> > > net/sched/sch_sfq.c | 7 ++++++-
> > > 1 file changed, 6 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
> > > index 3cf478d..cb331de 100644
> > > --- a/net/sched/sch_sfq.c
> > > +++ b/net/sched/sch_sfq.c
> > > @@ -548,8 +548,13 @@ static int sfq_dump_class_stats(struct Qdisc *sch, unsigned long cl,
> > > {
> > > struct sfq_sched_data *q = qdisc_priv(sch);
> > > sfq_index idx = q->ht[cl-1];
> > > - struct gnet_stats_queue qs = { .qlen = q->qs[idx].qlen };
> > > + struct sk_buff_head *list = &q->qs[idx];
> > > + struct gnet_stats_queue qs = { .qlen = list->qlen };
> > > struct tc_sfq_xstats xstats = { .allot = q->allot[idx] };
> > > + struct sk_buff *skb;
> > > +
> > > + skb_queue_walk(list, skb)
> > > + qs.backlog += qdisc_pkt_len(skb);
> >
> > I don't think you can walk this list without the qdisc lock.
>
> So after checks, I confirm qdisc lock is held at this point, patch is
> valid.
>
> tc_fill_tclass() calls gnet_stats_start_copy_compat() (and locks
> qdisc_root_sleeping_lock()), before calling
> cl_ops->dump_stats(q, cl, &d)
>
> Thanks !
You are right. Sorry for misleading.
Jarek P.
next prev parent reply other threads:[~2010-12-16 13:09 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-15 14:03 [PATCH] net_sched: sch_sfq: fix allot handling Eric Dumazet
2010-12-15 16:03 ` Patrick McHardy
2010-12-15 16:27 ` Eric Dumazet
2010-12-15 16:40 ` [PATCH v2] " Eric Dumazet
2010-12-15 16:43 ` Patrick McHardy
2010-12-15 16:55 ` Eric Dumazet
2010-12-15 17:03 ` Patrick McHardy
2010-12-15 17:09 ` Eric Dumazet
2010-12-15 17:21 ` Patrick McHardy
2010-12-15 17:30 ` [PATCH v3] " Eric Dumazet
2010-12-15 18:18 ` [PATCH net-next-2.6] net_sched: sch_sfq: add backlog info in sfq_dump_class_stats() Eric Dumazet
2010-12-15 19:10 ` Eric Dumazet
2010-12-16 8:16 ` Jarek Poplawski
2010-12-16 10:18 ` [PATCH v2 " Eric Dumazet
2010-12-16 11:03 ` [PATCH " Eric Dumazet
2010-12-16 13:09 ` Jarek Poplawski [this message]
2010-12-20 21:14 ` David Miller
2010-12-20 21:18 ` [PATCH v3] net_sched: sch_sfq: fix allot handling David Miller
2010-12-16 13:08 ` [PATCH v2] " Eric Dumazet
2010-12-17 16:52 ` [RFC PATCH] net_sched: sch_sfq: better struct layouts Eric Dumazet
2010-12-19 21:22 ` Jarek Poplawski
2010-12-20 17:02 ` [PATCH v2] " Eric Dumazet
2010-12-20 21:33 ` David Miller
2010-12-20 21:42 ` Eric Dumazet
2010-12-20 22:54 ` [PATCH v3 net-next-2.6] " Eric Dumazet
2010-12-21 5:33 ` David Miller
2010-12-20 22:55 ` [PATCH v2] " Jarek Poplawski
2010-12-20 23:16 ` [PATCH net-next-2.6] sch_sfq: allow big packets and be fair Eric Dumazet
2010-12-21 10:15 ` Jarek Poplawski
2010-12-21 10:30 ` Jarek Poplawski
2010-12-21 10:44 ` Eric Dumazet
2010-12-21 10:56 ` Jarek Poplawski
2010-12-21 10:57 ` Eric Dumazet
2010-12-21 11:39 ` Jarek Poplawski
2010-12-21 12:17 ` Jarek Poplawski
2010-12-21 13:04 ` [PATCH v2 " Eric Dumazet
2010-12-21 13:47 ` Jarek Poplawski
2010-12-28 21:46 ` David Miller
2010-12-29 7:53 ` [PATCH v3 " Eric Dumazet
2010-12-31 20:48 ` David Miller
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