linux-kernel - Re: [PATCH 2/2] x86/MCE: Add command line option to extend MCE Records pool

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Message-ID: <20240212093246.GBZcnlvkPKDC8C7rv5@fat_crate.local>
Date: Mon, 12 Feb 2024 10:32:46 +0100
From: Borislav Petkov <bp@...en8.de>
To: "Naik, Avadhut" <avadnaik@....com>
Cc: Sohil Mehta <sohil.mehta@...el.com>, x86@...nel.org,
	linux-edac@...r.kernel.org, tony.luck@...el.com,
	linux-kernel@...r.kernel.org, yazen.ghannam@....com,
	Avadhut Naik <avadhut.naik@....com>
Subject: Re: [PATCH 2/2] x86/MCE: Add command line option to extend MCE
 Records pool

On Mon, Feb 12, 2024 at 09:58:01AM +0100, Borislav Petkov wrote:
> * Can you think of a slick deduplication scheme instead of blindly
> raising the buffer size?

And here's the simplest scheme: you don't extend the buffer. On
overflow, you say "Buffer full, here's the MCE" and you dump the error
long into dmesg. Problem solved.

A slicker deduplication scheme would be even better, tho. Maybe struct
mce.count which gets incremented instead of adding the error record to
the buffer again. And so on...

-- 
Regards/Gruss,
    Boris.

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