Setting the timeout action

Red Hat Enterprise Linux 9.2 LPAR mode z/VM guest KVM guest

How to configure the timeout action for the diag288 watchdog device driver depends on your hypervisor environment.

LPAR: For Linux® in LPAR mode, the shutdown action is defined through the restart shutdown trigger.
z/VM®: For Linux on z/VM, the shutdown action is defined through the restart shutdown trigger.
You can also use the diag288_wdt.cmd= kernel parameter or the cmd= module parameter to bypass the restart shutdown trigger and directly specify a z/VM CP command to be issued.
KVM: For Linux on KVM, the shutdown action is defined in the virtual server configuration on the KVM hypervisor.