linux-kernel - Re: [UNTESTED PATCH] x86, mce: Avoid double entry of deferred errors into the genpool.

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Message-ID: <20151124073639.GA3785@pd.tnic>
Date:	Tue, 24 Nov 2015 08:36:39 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	"Chen, Gong" <gong.chen@...ux.intel.com>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [UNTESTED PATCH] x86, mce: Avoid double entry of deferred errors
 into the genpool.

On Tue, Nov 24, 2015 at 12:19:18AM +0000, Luck, Tony wrote:
> > Also, two more fixes I've done while injecting in a kvm guest I'm
> > sending as a reply to this message. Will inject on a real box too.
> 
> Ok ... applied those two on top of my "UNTESTED" patch and injected an error to force a UCNA log.

Ok, what error type is that in EINJ nomenclature? I had only

/sys/kernel/debug/apei/einj/available_error_type:0x00000002     Processor Uncorrectable non-fatal
/sys/kernel/debug/apei/einj/available_error_type:0x00000008     Memory Correctable
/sys/kernel/debug/apei/einj/available_error_type:0x00000010     Memory Uncorrectable non-fatal

and I would've guessed it is the 0x10 type, i.e., the memory
uncorrectable which is non-fatal - assuming here - but that one got
promoted to a #MC on my box.

The processor uncorrectable didn't want to inject due to missing EINJ
instruction 0x5 or so...

> Everything looked ok. Just one copy on the console and in
> /var/log/mcelog (actually logs from bank7 and bank3 ... but that was
> expected from this test).

Good.

> So my patch is tested, and take this
> 
> Acked-by: Tony Luck <tony.luck@...el.com> for your two additional patches.

Thanks!

-- 
Regards/Gruss,
    Boris.

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