linux-kernel - Re: [PATCHv3 2/2] drm/amdgpu: Register MCE notifier for Aldebaran RAS

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Date:   Mon, 27 Sep 2021 18:37:05 +0000
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Joshi, Mukul" <Mukul.Joshi@....com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>
Subject: Re: [PATCHv3 2/2] drm/amdgpu: Register MCE notifier for Aldebaran RAS

On Sat, Sep 25, 2021 at 01:20:57PM +0200, Borislav Petkov wrote:
> On Fri, Sep 24, 2021 at 07:46:10PM +0000, Yazen Ghannam wrote:
> > I agree with you in general. But this device isn't really a GPU. And
> > users of this device seem to want to count *every* error, at least for
> > now.
> 
> Aha, so something accelerator-y where they do general purpose computation.
> 
> So what's the big picture here: they count all the errors and when they
> reach a certain amount, they decide to replace the GPUs just in case?
> 
> Or wait until they become uncorrectable? But then it doesn't matter
> because we will handle it properly by excluding the VRAM range from
> further use.
> 
> Or do they wanna see *when* they had the correctable errors so that they
> can restart the computation, just in case.
> 
> Dunno, it would be a lot helpful if we had some RAS strategy for those
> things...
>

I completely agree. The system integrators have their own policies for error
tracking, part replacement, etc. I expect they'll propose kernel changes if
they want any. Though I think general strategies will become apparent once
these sort of devices are in wider use.

Thanks,
Yazen