Kernel panic - not syncing: softlockup: hung tasks / watchdog thread unable to run due to throttled real-time run queue
Issue
- The watchdog thread is unable to run due to a throttled real-time run queue and as a result a softlockup is reported
- A high
se.exec_maxvalue (e.g. 54.7 seconds) can erroneously cause throttling of the real-time run queue - The high
se.exec_maxvalue is a side-effect of something pathological happening in the thread that was running on the same CPU prior to the affected real-time thread
Environment
- Red Hat Enterprise Linux 6
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