Commit d3028305 authored Aug 03, 2016 by Lv Zheng Committed by Rafael J. Wysocki Aug 31, 2016

ACPI / EC: Enable event freeze mode to improve event handling for suspend process



This patch enables the event freeze mode, flushing the EC event handling in
.suspend() callback. This feature is experimental, if it is bisected out to
be the cause of the real issues, please report the issues to the kernel
bugzilla for further root causing and improvement.

This mode eliminates useless _Qxx handling during the power saving
operations, thus can help to tune the power saving operations faster. Tests
show that this mode can efficiently block flooding _Qxx during the suspend
process and tune the speed of the suspend faster.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Tested-by: Todd E Brandt <todd.e.brandt@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 39a2a2aa

drivers/acpi/ec.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -146,7 +146,7 @@ static unsigned int ec_storm_threshold __read_mostly = 8;
		module_param(ec_storm_threshold, uint, 0644);
		MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm");

		static bool ec_freeze_events __read_mostly = false;
		static bool ec_freeze_events __read_mostly = true;
		module_param(ec_freeze_events, bool, 0644);
		MODULE_PARM_DESC(ec_freeze_events, "Disabling event handling during suspend/resume");

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