Re: [PATCH 6/7] locking/qspinlock: A fairer queued unfair lock
On Sat, Jul 11, 2015 at 04:36:57PM -0400, Waiman Long wrote: > For a virtual guest with the qspinlock patch, a simple unfair byte lock > will be used if PV spinlock is not configured in or the hypervisor > isn't either KVM or Xen.
Why do we care about this case enough to add over 300 lines of code?