netdev - Re: [Patch net-next v2] net_sched: introduce tracepoint trace_qdisc

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Message-ID: <CAM_iQpVAuF0Pq1qmKRWoOvBPPMSaf1seKykEwYvVhm0tRkNo4A@mail.gmail.com>
Date:   Sun, 11 Jul 2021 20:39:45 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Tonghao Zhang <xiangxia.m.yue@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Qitao Xu <qitao.xu@...edance.com>,
        Cong Wang <cong.wang@...edance.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>
Subject: Re: [Patch net-next v2] net_sched: introduce tracepoint trace_qdisc_enqueue()

On Sun, Jul 11, 2021 at 8:36 PM Tonghao Zhang <xiangxia.m.yue@...il.com> wrote:
>
> On Mon, Jul 12, 2021 at 11:23 AM Cong Wang <xiyou.wangcong@...il.com> wrote:
> > Sure, in that case a different packet is dropped, once again you
> > can trace it with kfree_skb() if you want. What's the problem?
> It's ok, but we can make it better. Yunsheng Lin may have explained why?

Why it is better to trace dropped packets both in enqueue and in kfree_skb()?
I fail to see it. You are just asking for duplications. If you do not see it by
yourself, it means you don't understand or need it at all. ;)

Thanks.