kernel: rcu_bh_state detected stall on CPU # (t=0 jiffies) with linux UEK (Doc ID 1959693.1)

Last updated on JANUARY 12, 2015

Applies to:

Linux OS - Version Oracle Linux 5.9 with Unbreakable Enterprise Kernel [2.6.39] to Oracle Linux 5.9 with Unbreakable Enterprise Kernel [2.6.39] [Release OL5U9]
Oracle Exadata Storage Server Software - Version 11.2.3.1.0 to 11.2.3.3.0 [Release 11.2]
Information in this document applies to any platform.

Symptoms

Messages file reports the below :

 

kernel: INFO: rcu_bh_state detected stall on CPU 44 (t=0 jiffies)
kernel: sending NMI to all CPUs:
kernel: NMI backtrace for cpu 2
kernel: CPU 2


* the example shows 44 but it may be any CPU core number #.

Cause

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