Lines Matching +full:power +full:- +full:saving
1 # SPDX-License-Identifier: GPL-2.0-only
9 suspend-to-RAM state (e.g. the ACPI S3 state).
30 user-space before invoking suspend. There's a run-time switch
31 at '/sys/power/sync_on_suspend' to configure this behaviour.
32 This setting changes the default for the run-tim switch. Say Y
50 You can suspend your machine with 'echo disk > /sys/power/state'
60 for suspend states like suspend-to-RAM (STR) often don't work very
72 <file:Documentation/power/swsusp-and-swap-files.rst>).
81 For more information take a look at <file:Documentation/power/swsusp.rst>.
122 The default resume partition is the partition that the suspend-
123 to-disk implementation will look for a suspended disk image.
157 non-zero numbered CPU, it may define ARCH_SUSPEND_NONZERO_CPU. This
171 Notify kernel of aggressive userspace autosleep power management policy.
173 This option changes the behavior of various sleep-sensitive code to deal
174 with frequent userspace-initiated transitions into a global sleep state.
181 a userspace power manager service should enable this option; and not
192 objects with the help of a sysfs-based interface.
206 bool "Device power management core functionality"
208 Enable functionality allowing I/O devices to be put into energy-saving
209 (low power) states, for example after a specified period of inactivity
210 (autosuspended), and woken up in response to a hardware-generated
211 wake-up event or a driver's request.
216 wake-up events.
219 bool "Power Management Debug Support"
222 This option enables various debugging support in the Power Management
227 bool "Extra PM attributes in sysfs for low-level debugging/testing"
230 Add extra sysfs attributes allowing one to access some Power Management
232 developer interested in debugging/testing Power Management, say "no".
272 different then a non-fatal warning (with a stack trace of
274 timeout expires. If the suspend routine gets un-stuck
277 timeout expires then an emergency-level message and stack
289 example does by saving things in the RTC, see below.
292 functions from <linux/resume-trace.h> as well as the
293 <asm/resume-trace.h> header with a TRACE_RESUME() macro.
295 The way the information is presented is architecture-
312 dmesg -s 1000000 | grep 'hash matches'
314 CAUTION: this option will cause your machine's real-time clock to be
318 tristate "Advanced Power Management Emulation"
321 APM is a BIOS specification for saving power using several different
325 battery status information, and user-space programs will receive
329 and more information, read <file:Documentation/power/apm-acpi.rst>
330 and the Battery Powered Linux mini-HOWTO, available from
335 VESA-compliant "green" monitors.
352 bool "Enable workqueue power-efficient mode by default"
355 Per-cpu workqueues are generally preferred because they show
357 per-cpu workqueues tend to be more power hungry than unbound
361 per-cpu workqueues which were observed to contribute
362 significantly to power consumption unbound, leading to measurably
363 lower power usage at the cost of small performance overhead.
391 The exact usage of the energy model is subsystem-dependent.