linux-kernel - Re: [RFC PATCH v2 3/4] acpi: apei: Do not panic() when correctable errors are marked as fatal.

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Message-ID: <20180419190323.GF5635@pd.tnic>
Date:   Thu, 19 Apr 2018 21:03:23 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Alex G." <mr.nuke.me@...il.com>
Cc:     linux-acpi@...r.kernel.org, linux-edac@...r.kernel.org,
        rjw@...ysocki.net, lenb@...nel.org, tony.luck@...el.com,
        tbaicar@...eaurora.org, will.deacon@....com, james.morse@....com,
        shiju.jose@...wei.com, zjzhang@...eaurora.org,
        gengdongjiu@...wei.com, linux-kernel@...r.kernel.org,
        alex_gagniuc@...lteam.com, austin_bolen@...l.com,
        shyam_iyer@...l.com, devel@...ica.org, mchehab@...nel.org,
        robert.moore@...el.com, erik.schmauss@...el.com
Subject: Re: [RFC PATCH v2 3/4] acpi: apei: Do not panic() when correctable
 errors are marked as fatal.

(snip useful explanation).

On Thu, Apr 19, 2018 at 12:40:54PM -0500, Alex G. wrote:
> On the r740xd, FW just hides those errors from the OS with no further
> notification. On this machine BIOS sets things up such that non-posted
> requests report fatal (PCIe) errors. FW still tries very hard to hide
> this from the OS, and I think the heuristic is that if the drive
> physical presence is gone, don't even report the error.

Ok, second question: can you detect from the error signatures alone that
it was a surprise removal? How does such an error look like, in detail?
Got error logs somewhere to dump?

Thx.

-- 
Regards/Gruss,
    Boris.

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