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Subject[2.6.18] BUG: warning at kernel/cpu.c:51/unlock_cpu_hotplug()

While running 2.6.18 on an IBM x3650 with nothing but setiathome (there
are 2 quadcores and 10GB ram in this device) I get the following errors:

BUG: warning at kernel/cpu.c:51/unlock_cpu_hotplug()

Call Trace:
[<ffffffff80293ed7>] unlock_cpu_hotplug+0x3f/0x6c
[<ffffffff8822f2a7>] :cpufreq_ondemand:do_dbs_timer+0x119/0x171
[<ffffffff80249150>] run_workqueue+0x94/0xe5
[<ffffffff80245b22>] worker_thread+0x0/0x122
[<ffffffff8028f8fc>] keventd_create_kthread+0x0/0x61
[<ffffffff80245c12>] worker_thread+0xf0/0x122
[<ffffffff8027c9b3>] default_wake_function+0x0/0xe
[<ffffffff8028f8fc>] keventd_create_kthread+0x0/0x61
[<ffffffff8028f8fc>] keventd_create_kthread+0x0/0x61
[<ffffffff802305dc>] kthread+0xd4/0x107
[<ffffffff80258aa0>] child_rip+0xa/0x12
[<ffffffff8028f8fc>] keventd_create_kthread+0x0/0x61
[<ffffffff80230508>] kthread+0x0/0x107
[<ffffffff80258a96>] child_rip+0x0/0x12

errors: they come by regularly, like 25 times in the 56 minutes this
system has been up.

Folkert van Heusden

Phone: +31-6-41278122, PGP-key: 1F28D8AE,

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