linux-kernel - Re: [PATCH 4/5] x86/mce: Fix all mce notifiers to update the mce->handled bitmask

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Message-ID: <20200214090241.GE13395@zn.tnic>
Date:   Fri, 14 Feb 2020 10:02:41 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Luck, Tony" <tony.luck@...el.com>
Cc:     Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/5] x86/mce: Fix all mce notifiers to update the
 mce->handled bitmask

On Thu, Feb 13, 2020 at 03:08:07PM -0800, Luck, Tony wrote:
> Ok. We don't have code that does this yet. If we need some, I'll
> make sure to do the weed out before it gets to the notifier.

... which would make running the CEC hook *before* running the notifiers
the easiest thing. Hacking in "did-CEC-handle-it" logic in the rest of
the chain is just going to be painful so the best would be IMO: if the
CEC decided to consume it, it won't even go down the notifiers.

Just like the added crap^W value firmware-first thing does and we should
learn from it. :-)

-- 
Regards/Gruss,
    Boris.

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