linux-kernel - Re: [PATCH] x86/mce: Clear a useless global variable in mce.c

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Date:	Tue, 20 May 2014 12:02:52 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Chen Yucong <slaoub@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
Subject: Re: [PATCH] x86/mce: Clear a useless global variable in mce.c

On Mon, May 19, 2014 at 10:06:38PM +0000, Luck, Tony wrote:
> I doubt there is any hope for recovery if not all processors show up
> ... things have to be already very broken for the machine check to be
> blocked.

Good, so this whole babble about the potential of a timeout and whatever
is all beside the point.

What we want to do is if any of the cores are stuck - monarch or not -
we want to panic the hell out of this box and not do anything further.
So only the tolerant check would need adjusting.

> I'm OK with it going - but as I said before I'd like to see mce_callin
> printed (so I can tell if just one cpu showed up, just the cpus from
> one socket, or some other significant number).

I don't think you want to do this unconditionally, do you? Rather maybe
mce_timed_out dumps the order variable before the box panics :-)

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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