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x86 thermal: Disable power limit notification interrupt by default

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The package power limit notification interrupt is primarily for
system diagnosis, and should not be blindly enabled on every
system by default -- particuarly since Linux does nothing in the
handler except count how many times it has been called...

Add a new kernel cmdline parameter "int_pln_enable" for situations where
users want to oberve these events via existing system counters:

$ grep TRM /proc/interrupts

$ grep . /sys/devices/system/cpu/cpu*/thermal_throttle/*

https://bugzilla.kernel.org/show_bug.cgi?id=36182

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Fenghua Yu
2013-05-21 15:35:17 -04:00
committed by Tony Luck
parent c81147483e
commit 6bb2ff846f
2 changed files with 28 additions and 8 deletions
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2
Documentation/kernel-parameters.txt
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@@ -1158,6 +1158,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver
Format: <irq>
int_pln_enable [x86] Enable power limit notification interrupt
intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
on
Enable intel iommu driver.