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 TSCForgive my utter ignorance, specially if it is to become
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;
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?