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Date:   Fri, 17 Feb 2017 13:03:40 +0530
From:   Ritesh Raj Sarraf <rrs@...earchut.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-acpi@...r.kernel.org
Cc:     acpi@...ux.intel.com
Subject: 4.10-rc8: mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 6:
 ae0000000040110a

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Hash: SHA512

Hello,

WIth the 4.10-rc8 kernel, I keep getting the following (non-fatal) error on
every boot.
With previous kernels, the mcelog daemon used to register errors occasionally.
But the errors messages weren't recurrent on every boot.

Filing it here, in case it is not a hardware bug.


On 4.10-rc8:

Feb 16 22:23:58 learner kernel: CPU: Physical Processor ID: 0
Feb 16 22:23:58 learner kernel: CPU: Processor Core ID: 0
Feb 16 22:23:58 learner kernel: ENERGY_PERF_BIAS: Set to 'normal', was
'performance'
Feb 16 22:23:58 learner kernel: ENERGY_PERF_BIAS: View and update with
x86_energy_perf_policy(8)
Feb 16 22:23:58 learner kernel: mce: CPU supports 7 MCE banks
Feb 16 22:23:58 learner kernel: CPU0: Thermal monitoring enabled (TM1)
Feb 16 22:23:58 learner kernel: process: using mwait in idle threads
Feb 16 22:23:58 learner kernel: Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB
1024
Feb 16 22:23:58 learner kernel: Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB
1024, 1GB 4
Feb 16 22:23:58 learner kernel: Freeing SMP alternatives memory: 24K
Feb 16 22:23:58 learner kernel: ftrace: allocating 25290 entries in 99 pages
Feb 16 22:23:58 learner kernel: smpboot: Max logical packages: 4
Feb 16 22:23:58 learner kernel: ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1
pin2=-1
Feb 16 22:23:58 learner kernel: TSC deadline timer enabled
Feb 16 22:23:58 learner kernel: smpboot: CPU0: Intel(R) Core(TM) i7-4510U CPU @
2.00GHz (family: 0x6, model: 0x45, stepping: 0x1)
Feb 16 22:23:58 learner kernel: mce: [Hardware Error]: CPU 0: Machine Check: 0
Bank 6: ae0000000040110a
Feb 16 22:23:58 learner kernel: mce: [Hardware Error]: TSC 0 ADDR fef87300 MISC
78a0000086 
Feb 16 22:23:58 learner kernel: mce: [Hardware Error]: PROCESSOR 0:40651 TIME
1487264016 SOCKET 0 APIC 0 microcode 1f
Feb 16 22:23:58 learner kernel: Performance Events: PEBS fmt2+, Haswell events,
16-deep LBR, full-width counters, Intel PMU driver.
Feb 16 22:23:58 learner kernel: ... version:                3
Feb 16 22:23:58 learner kernel: ... bit width:              48
Feb 16 22:23:58 learner kernel: ... generic registers:      4
Feb 16 22:23:58 learner kernel: ... value mask:             0000ffffffffffff
Feb 16 22:23:58 learner kernel: ... max period:             00007fffffffffff
Feb 16 22:23:58 learner kernel: ... fixed-purpose events:   3
Feb 16 22:23:58 learner kernel: ... event mask:             000000070000000f
Feb 16 22:23:58 learner kernel: NMI watchdog: enabled on all CPUs, permanently
consumes one hw-PMU counter.
Feb 16 22:23:58 learner kernel: smp: Bringing up secondary CPUs ...
Feb 16 22:23:58 learner kernel: x86: Booting SMP configuration:
Feb 16 22:23:58 learner kernel: .... node  #0, CPUs:      #1 #2 #3
Feb 16 22:23:58 learner kernel: smp: Brought up 1 node, 4 CPUs
Feb 16 22:23:58 learner kernel: smpboot: Total of 4 processors activated
(20765.31 BogoMIPS)


On kernels prior to 4.10, occasional log:

[    0.041496] mce: CPU supports 7 MCE banks
[  299.540930] mce: [Hardware Error]: Machine check events logged

and

mcelog: failed to prefill DIMM database from DMI data
Hardware event. This is not a software error.
MCE 0
CPU 0 BANK 5
MISC 38a0000086 ADDR fef81880
TIME 1432455005 Sun May 24 13:40:05 2015
MCG status:
MCi status:
Error overflow
Uncorrected error
MCi_MISC register valid
MCi_ADDR register valid
Processor context corrupt
MCA: corrected filtering (some unreported errors in same region)
Generic CACHE Level-2 Generic Error
STATUS ee0000000040110a MCGSTATUS 0
MCGCAP c07 APICID 0 SOCKETID 0
CPUID Vendor Intel Family 6 Model 69
Hardware event. This is not a software error.
MCE 1
CPU 0 BANK 6
MISC 78a0000086 ADDR fef81780
TIME 1432455005 Sun May 24 13:40:05 2015
MCG status:
MCi status:
Uncorrected error
MCi_MISC register valid
MCi_ADDR register valid
Processor context corrupt
MCA: corrected filtering (some unreported errors in same region)
Generic CACHE Level-2 Generic Error
STATUS ae0000000040110a MCGSTATUS 0
MCGCAP c07 APICID 0 SOCKETID 0
CPUID Vendor Intel Family 6 Model 69
Hardware event. This is not a software error.
MCE 2
CPU 0 BANK 5
MISC 38a0000086 ADDR fef81880
TIME 1432455114 Sun May 24 13:41:54 2015
MCG status:
MCi status:
Error overflow
Uncorrected error
MCi_MISC register valid
MCi_ADDR register valid
Processor context corrupt
MCA: corrected filtering (some unreported errors in same region)
Generic CACHE Level-2 Generic Error
STATUS ee0000000040110a MCGSTATUS 0
MCGCAP c07 APICID 0 SOCKETID 0
CPUID Vendor Intel Family 6 Model 69
Hardware event. This is not a software error.
MCE 3
CPU 0 BANK 6
MISC 78a0000086 ADDR fef81780
TIME 1432455114 Sun May 24 13:41:54 2015
MCG status:
MCi status:
Uncorrected error
MCi_MISC register valid
MCi_ADDR register valid
Processor context corrupt
MCA: corrected filtering (some unreported errors in same region)
Generic CACHE Level-2 Generic Error
STATUS ae0000000040110a MCGSTATUS 0
MCGCAP c07 APICID 0 SOCKETID 0
CPUID Vendor Intel Family 6 Model 69




Full kernel log is available at:
https://people.debian.org/~rrs/tmp/kernel-4.10-rc8.log

I have also compiled a list of similar bugs reported:
https://bugzilla.redhat.com/show_bug.cgi?id=1152717
https://bugzilla.redhat.com/show_bug.cgi?id=1082211
https://www.researchut.com/blog/lenovo-yoga-2-13-debian

- -- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
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