On Thu, Nov 29, 2018 at 01:34:05PM -0500, Waiman Long wrote: > That will certainly work for x86. However, I am not sure if that will be > optimal for arm and powerpc.
smp_mb__before_atomic()
cmpxchg_relaxed()
works. Also see pv_kick_node()'s commit:
34d54f3d6917 ("locking/pvqspinlock: Relax cmpxchg's to improve performance on
some architectures")
you might know the author of that :-)
