[Bug 103351] Machine check exception on Broadwell quad-core with SpeedStep enabled

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https://bugzilla.kernel.org/show_bug.cgi?id=103351

Adrienne Cohea <adriennecohea@gmail.com> changed:

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                 CC|                            |adriennecohea@gmail.com

--- Comment #13 from Adrienne Cohea <adriennecohea@gmail.com> ---
This sounds a lot like what I am experiencing. I am on 4.1.6-1-ARCH #1 SMP
PREEMPT.

I have 100% ability to reproduce the lock up by trying to compile metasploit.
Everything I see in the systemd journal for the mcelog unit is of the form

Processor context corrupt
MCA: Internal Timer error
STATUS be00000000800400 MCGSTATUS 0

The CPU number on which the error occurs is generally 0 but not always.

I see a lot of MCGCAP lines that are the same across MCEs:

MCGCAP 1000c09 APICID 0 SOCKETID 0

APICID 0 (12 of 14 times)
APICID 2 (once)
APICID 4 (once)

Using "processor.max_cstate=0 intel_idle.max_cstate=0 idle=poll" worked for me
so far (but I only have a couple hours of up time; however, I'm now able to
compile stuff without the MCEs that have been happening with extreme regularity
during compiles).

I have not changed any settings in the BIOS, so SpeedStep is still on.

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