linux-kernel - Re: [PATCH] x86/mce: /dev/mcelog: Dynamically allocate space for machine check records

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Message-ID: <E10F764B-C5B8-4E35-ADAB-8E8E3D511426@intel.com>
Date:   Sat, 8 Feb 2020 04:22:34 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/mce: /dev/mcelog: Dynamically allocate space for
 machine check records


> On Feb 7, 2020, at 16:06, Tony Luck <tony.luck@...el.com> wrote:
> 
> We have had a hard coded limit of 32 machine check records since the
> dawn of time.  But as numbers of cores increase, it is possible for
> more than 32 errors to be reported 

Note that this is not a theoretical issue. Validation
team is hitting this in a case that doesn’t look
completely implausible.

-Tony