[제목] 커널 컴파일시 자동종료(power off)와 SMP 관련 설정

- 작성자 : 산이 san2(at)linuxchannel.net
- 작성일 : 2002.12.03


--- 질문 내용 -----------------------------------------------

> 시스템 종료시(halt, poweroff) 자동으로 전원이 꺼지도록
> 하고 싶습니다.
> 커널에서는 어떤 설정이 필요합니까?


--- 이하 답변 내용 -------------------------------------------

우선 CPU가 하나일 경우는 다음과 같이 설정하고 커널을 다시 컴파일해야 합니다.

General setup  --->
  [*] Power Management support
  [ ]   ACPI support
  <*>   Advanced Power Management BIOS support /*** 'M'으로 설정하면 부가 작업 필요 ***/
  [ ]     Ignore USER SUSPEND
  [ ]     Enable PM at boot time
  [ ]     Make CPU Idle calls when idle
  [ ]     Enable console blanking using APM
  [ ]     RTC stores time in GMT
  [ ]     Allow interrupts during APM BIOS calls
  [*]     Use real mode APM BIOS call to power off


그 외에 CPU 개수가 하나냐 아니면 여러개 있느냐에 따라서 설정이
조금씩 달라집니다. 예를 들어 CPU가 두개 있다면,
'[ ] Power Management support'으로 설정해야 합니다.
CPU가 2개 이상이면 자동종료는 되지 않습니다.


-- 이하 참고 설정 ----------------------------------------------

[only 1 CPU]

Processor type and features  --->
  [*] MTRR (Memory Type Range Register) support
	CONFIG_MTRR=Y
  [ ] Symmetric multi-processing support
	CONFIG_SMP is NULL
  [*] Local APIC support on uniprocessors (Advanced Programmable Interrupt Controller)
	CONFIG_X86_UP_APIC=Y or is NULL
  [*] IO-APIC support on uniprocessors
	CONFIG_X86_UP_IOAPIC=Y or is NULL

General setup  --->
  [*] Power Management support
	CONFIG_PM=Y				/*** must 'Y' ***/
  [ ]   ACPI support
  <*>   Advanced Power Management BIOS support
	CONFIG_APM=Y				/*** must 'Y', don't set 'M' ***/
  [ ]     Ignore USER SUSPEND
  [ ]     Enable PM at boot time
  [ ]     Make CPU Idle calls when idle
  [ ]     Enable console blanking using APM
  [ ]     RTC stores time in GMT
  [ ]     Allow interrupts during APM BIOS calls
  [*]     Use real mode APM BIOS call to power off
	CONFIG_APM_REAL_MODE_POWER_OFF=Y	/*** must 'Y', automaticall power off ***/

Character devices  --->
  < > Enhanced Real Time Clock Support
	CONFIG_RTC is NULL			/*** must 'N' ***/


---------------------------------------------------------------

[multi CPUs]

Processor type and features  --->
  [*] MTRR (Memory Type Range Register) support
	CONFIG_MTRR=Y
  [*] Symmetric multi-processing support
	CONFIG_SMP=Y				/*** must 'Y' ***/
  [ ] Local APIC support on uniprocessors (Advanced Programmable Interrupt Controller)
	CONFIG_X86_UP_APIC is NULL		/*** not appear, but used automatically ***/
  [ ] IO-APIC support on uniprocessors
	CONFIG_X86_UP_IOAPIC is NULL		/*** not appear, but used automatically ***/

General setup  --->
  [ ] Power Management support
	CONFIG_PM is NULL			/*** must 'N', and all sub options 'N' ***/
  [ ]   ACPI support
  < >   Advanced Power Management BIOS support
	CONFIG_APM is NULL			/*** must 'N', don't set 'Y' ***/
  [ ]     Ignore USER SUSPEND
  [ ]     Enable PM at boot time
  [ ]     Make CPU Idle calls when idle
  [ ]     Enable console blanking using APM
  [ ]     RTC stores time in GMT
  [ ]     Allow interrupts during APM BIOS calls
  [ ]     Use real mode APM BIOS call to power off
	CONFIG_APM_REAL_MODE_POWER_OFF is NULL	/*** must 'N' ***/

Character devices  --->
  <*> Enhanced Real Time Clock Support
	CONFIG_RTC=Y				/*** must 'Y', `mknod /dev/rtc c 10 135` ***/


EOF