mirror of
https://github.com/kernelkit/infix.git
synced 2026-08-06 07:33:01 +02:00
Tobias Waldekranz
553d659eac
Verify that if the system encounters a hard lockup, i.e., interrupts are no longer being serviced, then the system's watchdog will correctly reboot it.
29 lines
826 B
Plaintext
29 lines
826 B
Plaintext
=== Watchdog reset on system lockup
|
|
|
|
ifdef::topdoc[:imagesdir: {topdoc}../../test/case/hardware/watchdog]
|
|
|
|
==== Description
|
|
|
|
Verify that a system's watchdog trips and successfully reboots the
|
|
system back to a working state if a lockup occurs.
|
|
|
|
This is tested by using the Linux kernel's `test_lockup` module to
|
|
inject a hard lockup (i.e., blocking servicing of all interrupts) on
|
|
all CPU cores that lasts for twice as long as the watchdog's reported
|
|
timeout.
|
|
|
|
==== Topology
|
|
|
|
image::topology.svg[Watchdog reset on system lockup topology, align=center, scaledwidth=75%]
|
|
|
|
==== Sequence
|
|
|
|
. Set up topology and attach to target DUT
|
|
. Verify the presence of a watchdog device
|
|
. Verify the presence of the test_lockup module
|
|
. Trigger a hard lockup on all CPU cores
|
|
. Wait for the watchdog to trip
|
|
. Verify that the system reboots
|
|
|
|
|