netdev - Re: [Patch net-next 1/4] net_sched: introduce qdisc

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Message-ID: <CAM_iQpXyjg+d7idQBfmwX7PQgC5upaTC9327wPjMFVNNn=EAkQ@mail.gmail.com>
Date:	Wed, 14 Oct 2015 21:15:31 -0700
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Jamal Hadi Salim <jhs@...atatu.com>
Cc:	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [Patch net-next 1/4] net_sched: introduce qdisc_replace() helper

On Wed, Oct 14, 2015 at 4:56 AM, Jamal Hadi Salim <jhs@...atatu.com> wrote:
> On 10/12/15 14:38, Cong Wang wrote:
>>
>> Remove nearly duplicated code and prepare for the following patch.
>>
>
>
> Cong - like Dave, I dont see equivalence in some of these
> changes.
> Example not sure how the qfq grafting invocation of
> qfq_purge_queue fits in. There are a few others.

drr_purge_queue() and qfq_purge_queue() are both
qdisc_reset() + qdisc_tree_decrease_qlen():


static void drr_purge_queue(struct drr_class *cl)
{
        unsigned int len = cl->qdisc->q.qlen;

        qdisc_reset(cl->qdisc);
        qdisc_tree_decrease_qlen(cl->qdisc, len);
}

static void qfq_purge_queue(struct qfq_class *cl)
{
        unsigned int len = cl->qdisc->q.qlen;

        qdisc_reset(cl->qdisc);
        qdisc_tree_decrease_qlen(cl->qdisc, len);
}

Or you mean the order of calling them??
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