netdev - Re: [PATCH net-next v2] net: skb: export skb drop reaons to user by TRACE_DEFINE

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Date:   Thu, 27 Oct 2022 11:44:07 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     Menglong Dong <menglong8.dong@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        Menglong Dong <imagedong@...cent.com>,
        David Ahern <dsahern@...nel.org>,
        Hao Peng <flyingpeng@...cent.com>,
        Dongli Zhang <dongli.zhang@...cle.com>, robh@...nel.org,
        Pavel Begunkov <asml.silence@...il.com>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        Vasily Averin <vasily.averin@...ux.dev>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v2] net: skb: export skb drop reaons to user by
 TRACE_DEFINE_ENUM

On Thu, 27 Oct 2022 08:32:02 -0700
Eric Dumazet <edumazet@...gle.com> wrote:

> This seems broken again (tried on latest net-next tree)
> 
> perf script

Do you also have the latest perf and the latest libtraceevent installed?

-- Steve

>             sshd 12192 [006]   200.090602: skb:kfree_skb:
> skbaddr=0x2fa000400000 protocol=7844 location=0x2fa000001ea4 reason:
>          swapper     0 [030]   200.497468: skb:kfree_skb:
> skbaddr=0xba00400001 protocol=65535 location=0x9080c62800000000
> reason:
>  kworker/30:1-ev   308 [030]   200.497476: skb:kfree_skb:
> skbaddr=0xba00400001 protocol=65535 location=0x9080c62800000000
> reason:
>          swapper     0 [009]   200.957881: skb:kfree_skb:
> skbaddr=0x2fa400400000 protocol=12195 location=0x2fa400002fa3 reason:
>          swapper     0 [026]   201.515769: skb:kfree_skb:
> skbaddr=0xb600400001 protocol=65535 location=0x9080c62800000000
> reason:
>  kworker/26:1-mm   276 [026]   201.515797: skb:kfree_skb:
> skbaddr=0xb600400001 protocol=65535 location=0x9080c62800000000
> reason:
>  kworker/26:1-mm   276 [026]   201.515802: skb:kfree_skb:
> skbaddr=0x2f9f00400000 protocol=12189 location=0x2f9f00002f9d reason:
>          swapper     0 [030]   201.521484: skb:kfree_skb:
> skbaddr=0xba00400001 protocol=65535 location=0x9080c62800000000
> reason:
>  kworker/30:1-ev   308 [030]   201.521491: skb:kfree_skb:
> skbaddr=0x2fa100400000 protocol=12192 location=0x2fa100002fa0 reason: