linux-kernel - Re: [PATCH v3 3/3] EDAC/amd64: Enumerate memory on noncpu nodes

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Date:   Wed, 8 Sep 2021 20:41:46 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Yazen Ghannam <yazen.ghannam@....com>
Cc:     Naveen Krishna Chatradhi <nchatrad@....com>,
        linux-edac@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, mchehab@...nel.org,
        Muralidhara M K <muralimk@....com>
Subject: Re: [PATCH v3 3/3] EDAC/amd64: Enumerate memory on noncpu nodes

On Wed, Sep 01, 2021 at 06:42:26PM +0000, Yazen Ghannam wrote:
> err.channel still needs to be used in error_address_to_page_and_offset()
> below.

I think you mean __log_ecc_error().

> This is a good idea. But we have a global *fam_type, so this should be moved
> into struct amd64_pvt, if possible. Then each node can have its own fam_type.

per_family_init() does assign stuff to pvt members so yes, we're saying
the same thing, practically.

> Fair point. I like the idea of having unique names though. Is this possible
> with the current EDAC framework? Or is it not worth it?

We don't have unique names for the CPU nodes:

[   25.637486] EDAC MC0: Giving out device to module amd64_edac controller F17h_M30h: DEV 0000:00:18.3 (INTERRUPT)
[   25.799554] EDAC MC1: Giving out device to module amd64_edac controller F17h_M30h: DEV 0000:00:19.3 (INTERRUPT)

why does it matter to have unique names for the accelerators?

If you wanna differentiate them, you can dump the PCI devs like above.

Just to make it clear - I'm not against it per-se - I'd just need a
stronger justification for doing this than just "I like the idea".

-- 
Regards/Gruss,
    Boris.

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