BUG: soft lockup and scale_rt_power: clock: messages

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Environment

SUSE Linux Enterprise Server 11 Service Pack 2 (SLES 11 SP2)
SUSE Linux Enterprise Server 11 Service Pack 3 (SLES 11 SP3)

Situation

The /var/log/messages file includes lines like these:
linuxhost kernel: [7094858.800622] scale_rt_power: clock:1934bc8a8ac616 age:1934bc789fc900, avg:38649e13
linuxhost kernel: [7094858.912326] scale_rt_power: clock:1934bc91333a8b age:1934bc789fc900, avg:3874e665
linuxhost kernel: [7094858.932823] scale_rt_power: clock:1934bc9263add7 age:1934bc789fc900, avg:3878006d
linuxhost kernel: [7094858.936806] scale_rt_power: clock:1934bc92a2ea81 age:1934bc789fc900, avg:38788ea3

linuxhost kernel: [7194543.949072] BUG: soft lockup - CPU#0 stuck for 40s! [kjournald:2058]
linuxhost kernel: [7194543.949080] BUG: soft lockup - CPU#1 stuck for 40s! [flush-253:0:2019]
linuxhost kernel: [7194543.949087] BUG: soft lockup - CPU#2 stuck for 37s! [oracle:8769]
linuxhost kernel: [7194543.949094] BUG: soft lockup - CPU#3 stuck for 36s! [oracle:8748]

Resolution

This bug has been fixed in kernel 3.0.101-0.7.15.1 on SLES 11 SP2 and 3.0.101-0.15.1 on SLES 11 sp3. However, it is advised to update to the the most recently released kernel.

Cause

A softlockup was being caused in the shrink_dcache_for_umount_subtree.

Disclaimer

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