https://bugzilla.kernel.org/show_bug.cgi?id=36182
--- Comment #12 from Fenghua Yu <fenghua...@intel.com> 2012-06-14 18:11:23 ---
This issue is fixed in upstream in
commit 29e9bf1841e4f9df13b4992a716fece7087dd237
Date: Fri Nov 4 13:31:23 2011 -0700
x86, mce, therm_throt: Don't report power limit and package level thermal
throttle events in
Thermal throttle and power limit events are not defined as MCE errors in
x86
architecture and should not generate MCE errors in mcelog.
Current kernel generates fake software defined MCE errors for these events.
This may confuse users because they may think the machine has real MCE
errors
while actually only thermal throttle or power limit events happen.
To make it worse, buggy firmware on some platforms may falsely generate
the events. Therefore, kernel reports MCE errors which users think as real
hardware errors. Although the firmware bugs should be fixed, on the other
hand,
kernel should not report MCE errors either.
So mcelog is not a good mechanism to report these events. To report the
events, we count the
package_power_limit_count, core_throttle_count, and package_throttle_count)
in
/sys/devices/system/cpu/cpu#/thermal_throttle/. Users can check the
counters
for each event on each CPU. Please note that all CPU's on one package
report
duplicate counters. It's user application's responsibity to retrieve a
package
level counter for one package.
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