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

[bugzilla-daemon@bugzilla.kernel.org]

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

okjwukwh@sharklasers.com changed:

           What    |Removed                     |Added
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                 CC|                            |okjwukwh@sharklasers.com

--- Comment #97 from okjwukwh@sharklasers.com ---
Using a Broadwell i7-5600U on OpenSuse Leap 42.1 may also provoke the lock
elision error.

At the moment I cannot tell how libc is built; from the contents of the rpms I
would guess that --enable-lock-elision is used.

Crashes so far only happen, when using a NVIDIA proprietary driver (tried
version 352* and 349* - same result). So it may be a problem with the driver.
But as of the [1] it should be ok when using a version < 352* which it's not in
my case.

The microcode version is reported to be 0x21 so the workaround with the MSI
0x13 update won't work. HLE is enabled as of /proc/cpuinfo, while TSX is not
present.

Also note: It seemed to work with OpenSuse 13.2 - maybe hinting at the
libc/lock-elision support.


processor       : 3 
vendor_id       : GenuineIntel 
cpu family      : 6 
model           : 61 
model name      : Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz 
stepping        : 4 
microcode       : 0x21 
cpu MHz         : 2053.492 
cache size      : 4096 KB 
physical id     : 0 
siblings        : 4 
core id         : 1 
cpu cores       : 2 
apicid          : 3 
initial apicid  : 3 
fpu             : yes 
fpu_exception   : yes 
cpuid level     : 20 
wp              : yes 
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse
36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm
constan
t_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf
eagerfpu pni
 pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid
sse4_1 s
se4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm
abm 3dno
wprefetch ida arat epb pln pts dtherm intel_pt tpr_shadow vnmi flexpriority ept
vpid fs
gsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap
xsaveopt 
bugs            : 
bogomips        : 5187.70 
clflush size    : 64 
cache_alignment : 64 
address sizes   : 39 bits physical, 48 bits virtual 
power management:


[1] https://www.phoronix.com/scan.php?page=news_item&px=NVIDIA-SKL-Latest-Woes

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