Which of the Following Statements Is Not True About Spinlocks

Multiple Choice

Which of the following statements is not true about spinlocks in Linux?

A) Spinlocks cannot be used on single processor machines.
B) A thread may disable kernel preemption on Symmetric Multi Processing machines instead of acquiring spinlocks.
C) A thread that acquires a spinlock cannot acquire the same lock a second time without first releasing the lock.
D) The Linux kernel is designed so that the spinlock is held only for only short durations.