linux-kernel - Re: [PATCH] netlink: Deal with ESRCH error in nlmsg

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Date:   Mon, 19 Jul 2021 21:29:51 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Yajun Deng <yajun.deng@...ux.dev>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] netlink: Deal with ESRCH error in nlmsg_notify()

On Sun, Jul 18, 2021 at 10:19 PM Yajun Deng <yajun.deng@...ux.dev> wrote:
> The failure seems due to the commit
>     cfdf0d9ae75b ("rtnetlink: use nlmsg_notify() in rtnetlink_send()")
>
> Deal with ESRCH error in nlmsg_notify() even the report variable is zero.

Looks like the tc-testing failure I saw is also due to this...

Why not just revert the above commit which does not have
much value? It at most saves some instructions.

Thanks.