What are the major differences between soft lockup and hard lockup which are both detected by watchdog?

孙世龙 sunshilong sunshilong369 at gmail.com
Sat Jul 11 10:48:14 EDT 2020

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What are the major differences between soft lockup and hard lockup
which are both detected by watchdog?
Here are some example logs:
1. Watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [cantest:1669]
2. NMI watchdog: Watchdog detected hard LOCKUP on CPU 0

Best regards.

Previous message: What methods or tools could be used to investigate the causes of hard or soft lockup?
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