On 2022-09-30, "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote: >> > - this_cpu_inc(ssp->sda->srcu_lock_count[idx]); >> > + this_cpu_inc(ssp->sda->srcu_lock_count[idx].counter); >> >> Is there any particular reason that you are directly modifying >> @counter instead of raw_cpu_ptr()+atomic_long_inc() that do you in >> __srcu_read_lock_nmisafe() of patch 2? > > Performance. From what I can see, this_cpu_inc() is way faster than > atomic_long_inc() on x86 and s390. Maybe also on loongarch. No idea > on arm64. Yeah, that's what I figured. I just wanted to make sure. FWIW, the rest of the series looks pretty straight forward to me. John
