netdev - Re: [PATCH v2 10/13] EDAC/altera: Skip the panic notifier if kdump is loaded

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Message-ID: <1ee275b3-97e8-4c2b-be88-d50898d17e23@igalia.com>
Date:   Wed, 17 Aug 2022 18:56:11 -0300
From:   "Guilherme G. Piccoli" <gpiccoli@...lia.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     pmladek@...e.com, Dinh Nguyen <dinguyen@...nel.org>,
        Tony Luck <tony.luck@...el.com>, akpm@...ux-foundation.org,
        bhe@...hat.com, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org,
        netdev@...r.kernel.org, x86@...nel.org, kernel-dev@...lia.com,
        kernel@...ccoli.net, halves@...onical.com, fabiomirmar@...il.com,
        alejandro.j.jimenez@...cle.com, andriy.shevchenko@...ux.intel.com,
        arnd@...db.de, corbet@....net, d.hatayama@...fujitsu.com,
        dave.hansen@...ux.intel.com, dyoung@...hat.com,
        feng.tang@...el.com, gregkh@...uxfoundation.org,
        mikelley@...rosoft.com, hidehiro.kawai.ez@...achi.com,
        jgross@...e.com, john.ogness@...utronix.de, keescook@...omium.org,
        luto@...nel.org, mhiramat@...nel.org, mingo@...hat.com,
        paulmck@...nel.org, peterz@...radead.org, rostedt@...dmis.org,
        senozhatsky@...omium.org, stern@...land.harvard.edu,
        tglx@...utronix.de, vgoyal@...hat.com, vkuznets@...hat.com,
        will@...nel.org, linux-edac@...r.kernel.org
Subject: Re: [PATCH v2 10/13] EDAC/altera: Skip the panic notifier if kdump is
 loaded

On 17/08/2022 18:46, Borislav Petkov wrote:
> On Wed, Aug 17, 2022 at 06:39:07PM -0300, Guilherme G. Piccoli wrote:
>> Sorry for the confusion, let me try to be a bit more clear:
> 
> I think you're missing the point. Lemme try again:
> 
> You *absolutely* must log those errors because they're important. It
> doesn't matter if this is done in a panic notifier and you're changing
> that whole shebang or through some other magic.
> 
> If you do, then this driver needs to *still* *log* those fatal errors -
> regardless through a panic notifier or some novel contraption it wants
> to use.
> 
> So if you want to change the panic notifiers, you *must* make sure those
> errors still do get logged.
> 
> Better?
> 

Boris, I understand the importance of the logs, for sure!

But do you agree that currently, in case of a kdump, that information
*is not collected*, with our without my patch?