The diag288 watchdog device driver
The watchdog device driver provides Linux watchdog applications with access to the watchdog timer.
You can use the diag288 watchdog in these environments:
- Linux on z/VM®
- Linux in LPAR mode as of z13s® and z13® with the enhancements of February 2016.
- Linux as a KVM guest
The diag288 watchdog device driver provides the following features:
- Access to the watchdog timer on IBM® Z.
- An API for watchdog applications.
Watchdog applications can be used to set up automated restart mechanisms. Watchdog-based restart mechanisms are an alternative to a networked heartbeat with STONITH.
Watchdog applications that communicate directly with the IBM Z firmware, the z/VM control program (CP), or the KVM host do not require a third operating system to monitor a heartbeat.