CONFIG_MAGIC_SYSRQ is not available for the selected architecture x86.
Result is shown for architecture um
Magic SysRq key
modulename: sysrq.ko
and/orpoweroff.ko
configname: CONFIG_MAGIC_SYSRQ
Linux Kernel Configuration
└─>UML-specific options
└─>Magic SysRq key
In linux kernel since version 2.6.12 )
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). 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 <a href="https://www.kernel.org/doc/Documentation/admin-guide/sysrq.rst">Documentation/admin-guide/sysrq.rst</a>. Don't say Y
unless you really know what this hack does.
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 <a href="https://www.kernel.org/doc/Documentation/admin-guide/sysrq.rst">Documentation/admin-guide/sysrq.rst</a>. Don't say Y
unless you really know what this hack does.