On Thu, Aug 19, 2010 at 10:07:17PM -1000, Zachary Amsden wrote: > Also, ensure that the storing of the offset and the reading of the TSC > are never preempted by taking a spinlock. While the lock is overkill > now, it is useful later in this patch series. > > + spinlock_t tsc_write_lock; Forgive my utter ignorance, specially if it is to become obvious in a latter patch: This is a vcpu-local operation, uses rdtscl, so pcpu-local too, and we don't expect multiple writers to it at the same time. Why do we need this lock? -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
