I find kexec very useful to speed-up the reboot of Linux servers.
One parameter into
This parameter is meant to "read Grub configuration file". But I don't understand what governs the choice between setting it to true or false.
What I understand: in Debian, the
/etc/init.d/kexec-load file contains the code used to reboot with kexec. When
USE_GRUB_CONFIG is set to true, then the Grub configuration file is read and its parameters are used to reboot.
USE_GRUB_CONFIG is set to false, then the current kernel is reloaded with its current parameters.
USE_GRUB_CONFIG set to true always reboot with the "normal" kernel.
USE_GRUB_CONFIG set to false always reboot without changing anything, ignoring whatever could be done to Grub.
Then I deduce I should set it to true in order to take advantage of updates into Grub config.
So why is the default value false? Am I wrong somewhere, or do most admins prefer to slow-boot with special parameters then fast-reboot with them?