LinuxにおけるSuspend to RAMの仕組みをお教えください。 Linux CPU TI AM3352, Kernel Version 4.19.59 →DDR3-SDRAM Power Off → CONFIG_SUSPEND: Allow the system to enter sleep states in which main memory is powered and thus its contents are preserved, such as the suspend-to-RAM state (e.g. the ACPI S3 state). Symbol: SUSPEND [=y] Type : bool Prompt: Suspend to RAM and standby Location: -> Power management options Defined at kernel/power/Kconfig:1 Depends on: ARCH_SUSPEND_POSSIBLE [=y] 'y' Power Off DDR3-SDRAMSelf refreshPower On Power Off()Power Off ## (1) Linuxsuspend-to-RAM (2) suspend-to-RAM

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Linux
, ( `open`/`close` `read`/`write` )
`suspend` `resume` ,
, Linux kernel ()

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* 4.19 Power Management Device Power Management Basics
* 2.4 ()
* LinuxACPI