RHEL8 and RHEL7 may be exposed to hard lockups in very active console code activity during LUN scanning due to watchdog timeout

Issue

• Tests with RHEL8 have shown a tendency to get into a hard lockup in the console card when booting with a large amount of attached SAN devices.
• The activity to the console creating large amounts of console output as the LUN scans happen may cause the system to lockup on boot due to an NMI watchdog trigger.
• The result is a hung system as kdump has not yet started.
• The NMI panic will be hidden.