Keith Owens writes:
 > Or have I missed something?

Nope, it is a fundamental problem with such kernel pre-emption
schemes.  As a result, it would also break our big-reader locks
(see include/linux/brlock.h).

Basically, anything which uses smp_processor_id() would need to
be holding some lock so as to not get pre-empted.

Later,
David S. Miller
davem@redhat.com
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