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The Linux kernel configuration item CONFIG_MAGIC_SYSRQ has multiple definitions:
lib/Kconfig.debugThe configuration item CONFIG_MAGIC_SYSRQ:
! CONFIG_UMLIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/admin-guide/sysrq.rst. Don't say Y unless you really know what this hack does.
arch/um/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_MCONSOLEIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). A key for each of the possible requests is provided.
This is the feature normally accomplished by pressing a key while holding SysRq (Alt+PrintScreen).
On UML, this is accomplished by sending a "sysrq" command with mconsole, followed by the letter for the requested command.
The keys are documented in Documentation/admin-guide/sysrq.rst. Don't say Y unless you really know what this hack does.
arch/um/Kconfig.umThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_MCONSOLEIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). A key for each of the possible requests is provided.
This is the feature normally accomplished by pressing a key while holding SysRq (Alt+PrintScreen).
On UML, this is accomplished by sending a "sysrq" command with mconsole, followed by the letter for the requested command.
The keys are documented in Documentation/admin-guide/sysrq.rst. Don't say Y unless you really know what this hack does.
arch/frv/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/m32r/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/x86_64/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
(none)If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/v850/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELEnables console device to interprent special characters as commands to dump state information.
arch/sparc64/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/sparc/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/sh64/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
(none)If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/sh/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
(none)If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/s390/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/ppc64/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/ppc/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/parisc/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/mips/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/m68knommu/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
(none)Enables console device to interpret special characters as commands to dump state information.
arch/m68k/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/ia64/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/i386/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/h8300/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
(none)Enables console device to interprent special characters as commands to dump state information.
arch/arm26/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/arm/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/alpha/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/mips/Kconfig-sharedThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/mips64/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
(none)If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
arch/s390x/KconfigThe configuration item CONFIG_MAGIC_SYSRQ:
CONFIG_DEBUG_KERNELIf you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does.
Raw data from LKDDb:
lkddb input .... .... .... .... 00000002 01000000 .... ................ .. .... .. ................ .... : CONFIG_MAGIC_SYSRQ : drivers/char/sysrq.c # in 2.6.35–2.6.36lkddb input .... .... .... .... 00000002 01000000 .... ................ .. .... .. ................ .... : CONFIG_MAGIC_SYSRQ : drivers/tty/sysrq.c # in 2.6.37–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.17, 6.18-rc+HEADThis page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).
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Automatically generated (in year 2025). See also LKDDb sources on GitLab