| From | Uladzislau Rezki <> | Date | Tue, 4 Oct 2022 13:41:38 +0200 | Subject | Re: [PATCH v7 02/11] rcu: Make call_rcu() lazy to save power |
| |
> trace_rcu_nocb_wake(rcu_state.name, rdp->cpu, TPS("Check")); > rcu_nocb_lock_irqsave(rdp, flags); > lockdep_assert_held(&rdp->nocb_lock); > bypass_ncbs = rcu_cblist_n_cbs(&rdp->nocb_bypass); > - if (bypass_ncbs && > + lazy_ncbs = READ_ONCE(rdp->lazy_len); > + > + if (bypass_ncbs && (lazy_ncbs == bypass_ncbs) && > + (time_after(j, READ_ONCE(rdp->nocb_bypass_first) + jiffies_till_flush) || > + bypass_ncbs > 2 * qhimark)) { Do you know why we want double "qhimark" threshold? It is not only this place, there are several. I am asking because it is not expected by the user.
-- Uladzsislau Rezki
|