>>>>> "David" == David Kuehling <[email protected]> writes:

> running a Xinghuo "Spark" 3A 6100 [4] from an encrypted root
> filesystem (dm_crypt+lvm), with kernels 3.5.0-8 and 3.5.0-9 [1] I get
> plenty of these error messages in the kernel log when doing I/O:

>  [ 933.398437] BUG: using smp_processor_id() in preemptible [00000000]
> code: kworker/2:2/2763

These errors go away when I use a kernel compiled with
CONFIG_LOONGSON3_CPUAUTOPLUG disabled.  This may point to the error
being logged by use of smp_processor_id() in do_autoplug_timer(). 

Unfortunately without cpu autoplugging my system consumes about 8 W more
when idle (or 1.50 € in electricity per months when running 24/7).  I
wonder whether these error messages can be savely ignored?

David
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