Hi, all, This following patch series is to disable mwait for CPU C-states and add the boot option of "idle=nomwait", "idle=halt" Patch 01: Disable the C2C3_FFH access mode if MWAIT is unsupported Patch 02: Add the boot option of "idle=halt". If the option of "idle=halt" is added, Halt will be used for CPU idle. In such case CPU C-state won't be used again for CPU idle. Patch 03: Add boot option of "idle=nomwait" to disable mwait for CPU C-states. If the option of "idle=nomwait" is added, OSPM won't use mwait for CPU C-states. Patch 04: Add DMI check to disable mwait for CPU C-states. For the bogus BIOS the mwait will automatically be disabled for CPU C-states. Thanks for the review. Yakui -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html