linux-kernel - Re: [PATCH V6 16/16] rv/reactor: Add the panic reactor

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Message-ID: <9845acf0-1567-d4bb-ef56-588d3415f72e@kernel.org>
Date:   Thu, 21 Jul 2022 18:43:10 +0200
From:   Daniel Bristot de Oliveira <bristot@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Gabriele Paoloni <gpaoloni@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Clark Williams <williams@...hat.com>,
        Tao Zhou <tao.zhou@...ux.dev>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-trace-devel@...r.kernel.org
Subject: Re: [PATCH V6 16/16] rv/reactor: Add the panic reactor

On 7/21/22 17:31, Steven Rostedt wrote:
> On Tue, 19 Jul 2022 19:27:21 +0200
> Daniel Bristot de Oliveira <bristot@...nel.org> wrote:
> 
>> Sample reactor that panics the system when an exception is found. This
>> is useful both to capture a vmcore, or to fail-safe a critical system.
> 
> BTW, do you plan on adding models to model the reactors?

I was about to say that at the panic level, it would not be needed, as code inspection
is reasonable (people in Elisa did IIRC). But then I recalled that we
have a printk reactor, and one might model it - at event level :-)

But then can disable the reactor :-).

-- Daniel

> ;-)
> 
> -- Steve