https://bugzilla.kernel.org/show_bug.cgi?id=36182
--- Comment #35 from Len Brown <l...@kernel.org> 2013-05-21 16:19:08 --- Created an attachment (id=102161) --> (https://bugzilla.kernel.org/attachment.cgi?id=102161) [1/2] x86 thermal: Disable power limit notification interrupt by default Power Limit Notification (X86_FEATURE_PLN) was added in Sandy Bridge to give the OS the option of knowing when the package has reached a configured power threshold. Linux-2.6.36 enabled this feature: 0199114c31798af5b83841b21759b64171060d9b (x86, hwmon: Package Level Thermal/Power: power limit) It enabld the interrupt, and the interrupt hander added to the MCE log and printed to the console: printk(KERN_CRIT "CPU%d: %s power limit notification (total events = %lu) printk(KERN_INFO "CPU%d: %s power limit normal\n" However, these events are quite routine on some systems under some conditions, alarming customers and provoking un-necessary customer support calls. So the MCE log entry was deleted in Linux-3.3: 29e9bf1841e4f9df13b4992a716fece7087dd237 (x86, mce, therm_throt: Don't report power limit and package level thermal throttle events in mcelog) Here we delete the corresponding kernel console messages, and then we disable the interrupt by default -- allowing it to be enabled by cmdline for diagnosis purposes. https://bugzilla.kernel.org/show_bug.cgi?id=36182 This pair of patches applies cleanly back to Linux-3.3. Documentation/kernel-parameters.txt | 2 ++ arch/x86/kernel/cpu/mcheck/therm_throt.c | 43 ++++++++++++++++++++++++++----------------- 2 files changed, 28 insertions(+), 17 deletions(-) [1/2] x86 thermal: Disable power limit notification interrupt by default [2/2] x86 thermal: Delete power-limit-notification console messages -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
