Lines Matching +full:keep +full:- +full:power +full:- +full:in +full:- +full:suspend
1 # SPDX-License-Identifier: GPL-2.0-only
2 config SUSPEND config
3 bool "Suspend to RAM and standby"
7 Allow the system to enter sleep states in which main memory is
9 suspend-to-RAM state (e.g. the ACPI S3 state).
12 bool "Enable freezer for suspend to RAM/standby" \
14 depends on SUSPEND
17 This allows you to turn off the freezer for suspend. If this is
18 done, no tasks are frozen for suspend to RAM/standby.
20 Turning OFF this setting is NOT recommended! If in doubt, say Y.
23 bool "Skip kernel's sys_sync() on suspend to RAM/standby"
24 depends on SUSPEND
29 of suspend, or they are content with invoking sync() from
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
39 bool "Hibernation (aka 'suspend to disk')"
46 Enable the suspend to disk (STD) functionality, which is usually
47 called "hibernation" in user interfaces. STD checkpoints the
50 You can suspend your machine with 'echo disk > /sys/power/state'
52 in your bootloader's configuration file.
55 from <http://suspend.sf.net>.
57 In principle it does not require ACPI or APM, although for example
59 of the reasons to use software suspend is that the firmware hooks
60 for suspend states like suspend-to-RAM (STR) often don't work very
63 It creates an image which is saved in your active swap. Upon the next
69 need to run mkswap against the swap partition used for the suspend.
72 <file:Documentation/power/swsusp-and-swap-files.rst>).
74 Right now you may boot without resuming and resume later but in the
75 meantime you cannot use the swap partition(s)/file(s) involved in
76 suspending. Also in this case you must not use the filesystems
77 that were mounted before the suspend. In particular, you MUST NOT
78 MOUNT any journaled filesystems mounted before the suspend or they
79 will get corrupted in a nasty way.
81 For more information take a look at <file:Documentation/power/swsusp.rst>.
93 If in doubt, say Y.
100 The default resume partition is the partition that the suspend-
101 to-disk implementation will look for a suspended disk image.
119 depends on SUSPEND || HIBERNATE_CALLBACKS
134 If an arch can suspend (for suspend, hibernate, kexec, etc) on a
135 non-zero numbered CPU, it may define ARCH_SUSPEND_NONZERO_CPU. This
149 Notify kernel of aggressive userspace autosleep power management policy.
151 This option changes the behavior of various sleep-sensitive code to deal
152 with frequent userspace-initiated transitions into a global sleep state.
154 Saying Y here, disables code paths that most users really should keep
155 enabled. In particular, only enable this if it is very common to be
159 a userspace power manager service should enable this option; and not
170 objects with the help of a sysfs-based interface.
184 bool "Device power management core functionality"
186 Enable functionality allowing I/O devices to be put into energy-saving
187 (low power) states, for example after a specified period of inactivity
188 (autosuspended), and woken up in response to a hardware-generated
189 wake-up event or a driver's request.
193 responsible for the actual handling of device suspend requests and
194 wake-up events.
197 bool "Power Management Debug Support"
200 This option enables various debugging support in the Power Management
202 suspend support.
205 bool "Extra PM attributes in sysfs for low-level debugging/testing"
208 Add extra sysfs attributes allowing one to access some Power Management
210 developer interested in debugging/testing Power Management, say "no".
213 bool "Test suspend/resume and wakealarm during bootup"
214 depends on SUSPEND && PM_DEBUG && RTC_CLASS=y
216 This option will let you suspend your machine during bootup, and
228 bool "Device suspend/resume watchdog"
232 locked up attempting to suspend/resume a device.
234 captured in pstore device for inspection in subsequent
238 int "Watchdog timeout in seconds"
248 example does by saving things in the RTC, see below.
251 functions from <linux/resume-trace.h> as well as the
252 <asm/resume-trace.h> header with a TRACE_RESUME() macro.
254 The way the information is presented is architecture-
259 bool "Suspend/resume event tracing"
264 This enables some cheesy code to save the last PM event point in the
266 during suspend (or more commonly, during resume).
268 To use this debugging feature you should attempt to suspend the
271 dmesg -s 1000000 | grep 'hash matches'
273 CAUTION: this option will cause your machine's real-time clock to be
277 tristate "Advanced Power Management Emulation"
280 APM is a BIOS specification for saving power using several different
284 battery status information, and user-space programs will receive
287 In order to use APM, you will need supporting software. For location
288 and more information, read <file:Documentation/power/apm-acpi.rst>
289 and the Battery Powered Linux mini-HOWTO, available from
294 VESA-compliant "green" monitors.
296 Generally, if you don't have a battery in your machine, there isn't
297 much point in using this driver and you should say N. If you get
300 APM in your BIOS).
311 bool "Enable workqueue power-efficient mode by default"
314 Per-cpu workqueues are generally preferred because they show
316 per-cpu workqueues tend to be more power hungry than unbound
320 per-cpu workqueues which were observed to contribute
321 significantly to power consumption unbound, leading to measurably
322 lower power usage at the cost of small performance overhead.
327 If in doubt, say N.
350 The exact usage of the energy model is subsystem-dependent.
352 If in doubt, say N.