Virtual machine reports a "BUG: soft lockup" (or multiple at the same time)
Issue
- Virtual machine guest suffers multiple soft lockups at the same time
- We are experiencing kernel panic due to softlockup.
-
Logs show messages like (examples from different sources):
BUG: soft lockup - CPU#6 stuck for 73s! [flush-253:0:1207] BUG: soft lockup - CPU#7 stuck for 74s! [processname:15706] BUG: soft lockup - CPU#5 stuck for 63s! [processname:25582] BUG: soft lockup - CPU#0 stuck for 64s! [proceessname:15789] --or-- <time> <hostname> kernel: NMI watchdog: BUG: soft lockup - CPU#6 stuck for 25s! [ksoftirqd/6:38] <time> <hostname> kernel: NMI watchdog: BUG: soft lockup - CPU#7 stuck for 22s! [ksoftirqd/7:43] <time> <hostname> kernel: NMI watchdog: BUG: soft lockup - CPU#7 stuck for 24s! [NetworkManager:945] <time> <hostname> kernel: NMI watchdog: BUG: soft lockup - CPU#7 stuck for 22s! [watchdog/7:41]
The following line may (or not) also be logged:
hrtimer: interrupt took NUMBER ns
Environment
- Red Hat Enterprise Linux (any version)
- Virtual machine
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