linux-kernel - Re: WARNING and PANIC in irq_matrix

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Message-ID: <alpine.DEB.2.21.1805282206440.1584@nanos.tec.linutronix.de>
Date:   Mon, 28 May 2018 22:09:45 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Song Liu <songliubraving@...com>
cc:     Song Liu <liu.song.a23@...il.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        Maor Gottlieb <maorg@...lanox.com>,
        Kernel Team <Kernel-team@...com>
Subject: Re: WARNING and PANIC in irq_matrix_free

On Mon, 28 May 2018, Song Liu wrote:
> This doesn't fix the issue with bnxt. Here is a trace with this patch:

That's just the backtrace which is not really helpful. The real question is
what leads to this scenaria.

What I was asking for is to enable the irq_vector and irq_matrix trace
points along with ftrace_dump_on_oops. The latter dumps the trace buffer
when the problem happens and that should give us a hint what actually
causes that.

Thanks,

	tglx