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

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Message-ID: <Yv1peAdCdn+Qi3xI@zn.tnic>
Date:   Thu, 18 Aug 2022 00:19:36 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Guilherme G. Piccoli" <gpiccoli@...lia.com>
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,
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        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 Wed, Aug 17, 2022 at 07:09:26PM -0300, Guilherme G. Piccoli wrote:
> Again - a matter of a trade-off, a good compromise must be agreed by all
> parties (kdump maintainers are usually extremely afraid of taking risks
> to not break kdump).

Right, and logging hw errors from a panic notifier feels simply weird.

x86 has its own, special notifier exactly for that and it is independent
from the panic path but it gets run right after the exception raised due
to the hw error is done.

Dunno if ARM has such facilities tho...

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette