linux-kernel - Re: [PATCH v6 1/2] acpi: apei: Rename ghes_severity() to ghes_cper

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Date:   Tue, 22 May 2018 11:33:36 -0700
From:   "Luck, Tony" <tony.luck@...el.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Borislav Petkov <bp@...en8.de>, "Alex G." <mr.nuke.me@...il.com>,
        alex_gagniuc@...lteam.com, austin_bolen@...l.com,
        shyam_iyer@...l.com, "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Tyler Baicar <tbaicar@...eaurora.org>,
        Will Deacon <will.deacon@....com>,
        James Morse <james.morse@....com>,
        Shiju Jose <shiju.jose@...wei.com>,
        "Jonathan (Zhixiong) Zhang" <zjzhang@...eaurora.org>,
        Dongjiu Geng <gengdongjiu@...wei.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 1/2] acpi: apei: Rename ghes_severity() to
 ghes_cper_severity()

On Tue, May 22, 2018 at 08:10:47PM +0200, Rafael J. Wysocki wrote:
> > PCIe fatal means that the link or the device is broken.
> 
> And that may really mean that the component in question is on fire.
> We just don't know.

Components on fire could be the root cause of many errors. If we really
believe that is a problem we should power the system off rather than
just calling panic() [not just for PCIe errors, but also for machine
checks, and perhaps a bunch of other places in the kernel].

True story: I used to work for Stratus Computer on fault tolerant
systems. A customer once called in with a "my computer is on fire"
report and asked what to do. The support person told them to power it
off. Customer asked "Isn't there something else? It's still running
just fine".

-Tony