linux-kernel - Re: Bricked x86 CPU with software?

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Message-ID: <20180104200637.GC10427@amd>
Date:   Thu, 4 Jan 2018 21:06:37 +0100
From:   Pavel Machek <pavel@....cz>
To:     Tim Mouraveiko <tim.ml@...opper.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Bricked x86 CPU with software?

Hi!

> In all my years of extensive experience writing drivers and kernels, I never came across a situation 
> where you could brick an x86 CPU. Not until recently, when I was working on debugging a piece of 
> code and I bricked an Intel CPU. I am not talking about an experimental motherboard or anything 
> exotic or an electrical issue where the CPU got fried, but before the software code execution the CPU 
> was fine and then it´s dead. There were signs that something was not right, that the code was causing 
> unusual behavior, which is what I was debugging.
> 
> Has anyone else ever experienced a bricked CPU after executing software code? I just wanted to get 
> input from the community to see if anyone had had any experience like that, since it seems rather 
> unusual to me.

Never seen that before. Can you try to brick another one? :-).

You may want to remove AC power and battery, wait for half an hour,
then attempt to boot it...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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