linux-kernel - Re: x86_64: 5.6.0: locking/lockdep.c:1155 lockdep_register

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Date:   Thu, 16 Apr 2020 23:15:22 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, Borislav Petkov <bp@...e.de>,
        Netdev <netdev@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Brian Gerst <brgerst@...il.com>, lkft-triage@...ts.linaro.org,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andriin@...com>
Subject: Re: x86_64: 5.6.0: locking/lockdep.c:1155 lockdep_register_key

On Sat, 11 Apr 2020 at 02:20, Cong Wang <xiyou.wangcong@...il.com> wrote:
>
> On Tue, Apr 7, 2020 at 2:58 AM Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
> >
> > On Linux mainline kernel 5.6.0 running kselftest on i386 kernel running on
> > x86_64 devices we have noticed this kernel warning.
>
> This is odd, the warning complains a lockdep key is static, but
> all of the 3 lockdep keys in netdev_register_lockdep_key() are
> dynamic. I don't see how this warning could happen.

I request to provide a debug patch which prints a detailed log.
Happy to test it again with your debug patch and will provide more information.


- Naresh