linux-kernel - Re: Dell XPS13: MCE (Hardware Error) reported

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Date:   Thu, 5 Jan 2017 12:43:30 -0800
From:   "Raj, Ashok" <ashok.raj@...el.com>
To:     Borislav Petkov <bp@...e.de>
Cc:     Alexander Alemayhu <alexander@...mayhu.com>,
        Daniel J Blueman <daniel@...ra.org>,
        Paul Menzel <pmenzel@...gen.mpg.de>, tony.luck@...el.com,
        linux@...mhuis.info, len.brown@...el.com,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        ashok.raj@...el.com, srinivas.pandruvada@...el.com
Subject: Re: Dell XPS13: MCE (Hardware Error) reported

Hi Boris


On Thu, Jan 05, 2017 at 09:31:47PM +0100, Borislav Petkov wrote:
> On Thu, Jan 05, 2017 at 09:10:34PM +0100, Alexander Alemayhu wrote:
> > Not sure if it is related, but I am also seeing those messages on my
> > MacBookPro11,3:
> 
> Yours look to me like thermal throttling MCEs. And TBH we whould
> not issue those as actual MCEs because they are not - they *signal*
> overheating condition only and should be handled differently.

That's right.. the thermal interrupts are being reported, that should have
started running cpu's at lower frequencies via some thermald. 
If that's not handled and the PCU starts enforcing trying to keep the temps 
under control system starts logging MCE's. 

Ccing Srinivas who might be able to give a better pointer to check why 
that's not happening.

The log didn't have the exact MCE's reported.. if you have mcelog, please
attach that in the report.

> 
> What does your /var/log/mcelog* log file contain?
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
> --