linux-kernel - Re: [PATCH 2/3] x86, ras: Extend machine check recovery code to annotated ring0 areas

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Date:	Wed, 11 Nov 2015 12:01:34 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
	x86@...nel.org
Subject: Re: [PATCH 2/3] x86, ras: Extend machine check recovery code to
 annotated ring0 areas

On Tue, Nov 10, 2015 at 02:11:35PM -0800, Luck, Tony wrote:
> That would be tidier ... the inside of the "if" has been gradually growing
> with added recovery paths.  I had to fold the mce_panic() line to shut
> checkpatch up.

Bah, I don't take checkpatch seriously anymore. In that case, you
could've left the line stick out, for all I know. Our monitors can do
more pixels since the 1980s I believe. :)

> But I'm not really sure what tolerant==3 people really want here. By skipping
> the recovery code they doom themselves to hitting the machine check again.

Looks like a loop to me, fun.

I guess the user application should be aware of BUS_MCEERR_AR and
not attempt the same access to not cause a loop with tolerant==3.
Alternatively, we can still kill it to prevent the looping...

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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