Lines Matching refs:rdp
153 static void rcu_report_exp_rdp(struct rcu_data *rdp);
155 static void check_cb_ovld_locked(struct rcu_data *rdp, struct rcu_node *rnp);
156 static bool rcu_rdp_is_offloaded(struct rcu_data *rdp);
157 static bool rcu_rdp_cpu_online(struct rcu_data *rdp);
222 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_get_n_cbs_cpu() local
224 if (rcu_segcblist_is_enabled(&rdp->cblist)) in rcu_get_n_cbs_cpu()
225 return rcu_segcblist_n_cbs(&rdp->cblist); in rcu_get_n_cbs_cpu()
303 static bool rcu_watching_snap_stopped_since(struct rcu_data *rdp, int snap) in rcu_watching_snap_stopped_since() argument
316 return snap != ct_rcu_watching_cpu_acquire(rdp->cpu); in rcu_watching_snap_stopped_since()
499 static void force_qs_rnp(int (*f)(struct rcu_data *rdp));
585 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); in rcu_irq_work_resched() local
594 if (do_nocb_deferred_wakeup(rdp) && need_resched()) { in rcu_irq_work_resched()
648 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); in __rcu_irq_enter_check_tick() local
657 if (!tick_nohz_full_cpu(rdp->cpu) || in __rcu_irq_enter_check_tick()
658 !READ_ONCE(rdp->rcu_urgent_qs) || in __rcu_irq_enter_check_tick()
659 READ_ONCE(rdp->rcu_forced_tick)) { in __rcu_irq_enter_check_tick()
671 raw_spin_lock_rcu_node(rdp->mynode); in __rcu_irq_enter_check_tick()
672 if (READ_ONCE(rdp->rcu_urgent_qs) && !rdp->rcu_forced_tick) { in __rcu_irq_enter_check_tick()
675 WRITE_ONCE(rdp->rcu_forced_tick, true); in __rcu_irq_enter_check_tick()
676 tick_dep_set_cpu(rdp->cpu, TICK_DEP_BIT_RCU); in __rcu_irq_enter_check_tick()
678 raw_spin_unlock_rcu_node(rdp->mynode); in __rcu_irq_enter_check_tick()
705 static void rcu_disable_urgency_upon_qs(struct rcu_data *rdp) in rcu_disable_urgency_upon_qs() argument
707 raw_lockdep_assert_held_rcu_node(rdp->mynode); in rcu_disable_urgency_upon_qs()
708 WRITE_ONCE(rdp->rcu_urgent_qs, false); in rcu_disable_urgency_upon_qs()
709 WRITE_ONCE(rdp->rcu_need_heavy_qs, false); in rcu_disable_urgency_upon_qs()
710 if (tick_nohz_full_cpu(rdp->cpu) && rdp->rcu_forced_tick) { in rcu_disable_urgency_upon_qs()
711 tick_dep_clear_cpu(rdp->cpu, TICK_DEP_BIT_RCU); in rcu_disable_urgency_upon_qs()
712 WRITE_ONCE(rdp->rcu_forced_tick, false); in rcu_disable_urgency_upon_qs()
767 static void rcu_gpnum_ovf(struct rcu_node *rnp, struct rcu_data *rdp) in rcu_gpnum_ovf() argument
770 if (ULONG_CMP_LT(rcu_seq_current(&rdp->gp_seq) + ULONG_MAX / 4, in rcu_gpnum_ovf()
772 WRITE_ONCE(rdp->gpwrap, true); in rcu_gpnum_ovf()
773 if (ULONG_CMP_LT(rdp->rcu_iw_gp_seq + ULONG_MAX / 4, rnp->gp_seq)) in rcu_gpnum_ovf()
774 rdp->rcu_iw_gp_seq = rnp->gp_seq + ULONG_MAX / 4; in rcu_gpnum_ovf()
782 static int rcu_watching_snap_save(struct rcu_data *rdp) in rcu_watching_snap_save() argument
795 rdp->watching_snap = ct_rcu_watching_cpu_acquire(rdp->cpu); in rcu_watching_snap_save()
796 if (rcu_watching_snap_in_eqs(rdp->watching_snap)) { in rcu_watching_snap_save()
797 trace_rcu_fqs(rcu_state.name, rdp->gp_seq, rdp->cpu, TPS("dti")); in rcu_watching_snap_save()
798 rcu_gpnum_ovf(rdp->mynode, rdp); in rcu_watching_snap_save()
814 static int rcu_watching_snap_recheck(struct rcu_data *rdp) in rcu_watching_snap_recheck() argument
818 struct rcu_node *rnp = rdp->mynode; in rcu_watching_snap_recheck()
828 if (rcu_watching_snap_stopped_since(rdp, rdp->watching_snap)) { in rcu_watching_snap_recheck()
829 trace_rcu_fqs(rcu_state.name, rdp->gp_seq, rdp->cpu, TPS("dti")); in rcu_watching_snap_recheck()
830 rcu_gpnum_ovf(rnp, rdp); in rcu_watching_snap_recheck()
852 if (WARN_ON_ONCE(!rcu_rdp_cpu_online(rdp))) { in rcu_watching_snap_recheck()
862 __func__, rdp->cpu, ".o"[rcu_rdp_cpu_online(rdp)], in rcu_watching_snap_recheck()
863 (long)rdp->rcu_onl_gp_seq, rdp->rcu_onl_gp_state, in rcu_watching_snap_recheck()
864 (long)rdp->rcu_ofl_gp_seq, rdp->rcu_ofl_gp_state); in rcu_watching_snap_recheck()
880 if (!READ_ONCE(rdp->rcu_need_heavy_qs) && in rcu_watching_snap_recheck()
884 WRITE_ONCE(rdp->rcu_need_heavy_qs, true); in rcu_watching_snap_recheck()
886 smp_store_release(&rdp->rcu_urgent_qs, true); in rcu_watching_snap_recheck()
888 WRITE_ONCE(rdp->rcu_urgent_qs, true); in rcu_watching_snap_recheck()
899 if (tick_nohz_full_cpu(rdp->cpu) && in rcu_watching_snap_recheck()
900 (time_after(jiffies, READ_ONCE(rdp->last_fqs_resched) + jtsq * 3) || in rcu_watching_snap_recheck()
902 WRITE_ONCE(rdp->rcu_urgent_qs, true); in rcu_watching_snap_recheck()
903 WRITE_ONCE(rdp->last_fqs_resched, jiffies); in rcu_watching_snap_recheck()
916 READ_ONCE(rdp->last_fqs_resched) + jtsq)) { in rcu_watching_snap_recheck()
917 WRITE_ONCE(rdp->last_fqs_resched, jiffies); in rcu_watching_snap_recheck()
921 !rdp->rcu_iw_pending && rdp->rcu_iw_gp_seq != rnp->gp_seq && in rcu_watching_snap_recheck()
922 (rnp->ffmask & rdp->grpmask)) { in rcu_watching_snap_recheck()
923 rdp->rcu_iw_pending = true; in rcu_watching_snap_recheck()
924 rdp->rcu_iw_gp_seq = rnp->gp_seq; in rcu_watching_snap_recheck()
925 irq_work_queue_on(&rdp->rcu_iw, rdp->cpu); in rcu_watching_snap_recheck()
928 if (rcu_cpu_stall_cputime && rdp->snap_record.gp_seq != rdp->gp_seq) { in rcu_watching_snap_recheck()
929 int cpu = rdp->cpu; in rcu_watching_snap_recheck()
935 rsrp = &rdp->snap_record; in rcu_watching_snap_recheck()
939 rsrp->nr_hardirqs = kstat_cpu_irqs_sum(rdp->cpu); in rcu_watching_snap_recheck()
940 rsrp->nr_softirqs = kstat_cpu_softirqs_sum(rdp->cpu); in rcu_watching_snap_recheck()
941 rsrp->nr_csw = nr_context_switches_cpu(rdp->cpu); in rcu_watching_snap_recheck()
943 rsrp->gp_seq = rdp->gp_seq; in rcu_watching_snap_recheck()
951 static void trace_rcu_this_gp(struct rcu_node *rnp, struct rcu_data *rdp, in trace_rcu_this_gp() argument
975 static bool rcu_start_this_gp(struct rcu_node *rnp_start, struct rcu_data *rdp, in rcu_start_this_gp() argument
991 trace_rcu_this_gp(rnp_start, rdp, gp_seq_req, TPS("Startleaf")); in rcu_start_this_gp()
999 trace_rcu_this_gp(rnp, rdp, gp_seq_req, in rcu_start_this_gp()
1011 trace_rcu_this_gp(rnp_start, rdp, gp_seq_req, in rcu_start_this_gp()
1023 trace_rcu_this_gp(rnp, rdp, gp_seq_req, TPS("Startedleafroot")); in rcu_start_this_gp()
1026 trace_rcu_this_gp(rnp, rdp, gp_seq_req, TPS("Startedroot")); in rcu_start_this_gp()
1030 trace_rcu_this_gp(rnp, rdp, gp_seq_req, TPS("NoGPkthread")); in rcu_start_this_gp()
1039 WRITE_ONCE(rdp->gp_seq_needed, rnp->gp_seq_needed); in rcu_start_this_gp()
1053 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); in rcu_future_gp_cleanup() local
1058 trace_rcu_this_gp(rnp, rdp, rnp->gp_seq, in rcu_future_gp_cleanup()
1134 static bool rcu_accelerate_cbs(struct rcu_node *rnp, struct rcu_data *rdp) in rcu_accelerate_cbs() argument
1139 rcu_lockdep_assert_cblist_protected(rdp); in rcu_accelerate_cbs()
1143 if (!rcu_segcblist_pend_cbs(&rdp->cblist)) in rcu_accelerate_cbs()
1146 trace_rcu_segcb_stats(&rdp->cblist, TPS("SegCbPreAcc")); in rcu_accelerate_cbs()
1159 if (rcu_segcblist_accelerate(&rdp->cblist, gp_seq_req)) in rcu_accelerate_cbs()
1160 ret = rcu_start_this_gp(rnp, rdp, gp_seq_req); in rcu_accelerate_cbs()
1163 if (rcu_segcblist_restempty(&rdp->cblist, RCU_WAIT_TAIL)) in rcu_accelerate_cbs()
1168 trace_rcu_segcb_stats(&rdp->cblist, TPS("SegCbPostAcc")); in rcu_accelerate_cbs()
1181 struct rcu_data *rdp) in rcu_accelerate_cbs_unlocked() argument
1186 rcu_lockdep_assert_cblist_protected(rdp); in rcu_accelerate_cbs_unlocked()
1188 if (!READ_ONCE(rdp->gpwrap) && ULONG_CMP_GE(rdp->gp_seq_needed, c)) { in rcu_accelerate_cbs_unlocked()
1190 (void)rcu_segcblist_accelerate(&rdp->cblist, c); in rcu_accelerate_cbs_unlocked()
1194 needwake = rcu_accelerate_cbs(rnp, rdp); in rcu_accelerate_cbs_unlocked()
1210 static bool rcu_advance_cbs(struct rcu_node *rnp, struct rcu_data *rdp) in rcu_advance_cbs() argument
1212 rcu_lockdep_assert_cblist_protected(rdp); in rcu_advance_cbs()
1216 if (!rcu_segcblist_pend_cbs(&rdp->cblist)) in rcu_advance_cbs()
1223 rcu_segcblist_advance(&rdp->cblist, rnp->gp_seq); in rcu_advance_cbs()
1226 return rcu_accelerate_cbs(rnp, rdp); in rcu_advance_cbs()
1234 struct rcu_data *rdp) in rcu_advance_cbs_nowake() argument
1236 rcu_lockdep_assert_cblist_protected(rdp); in rcu_advance_cbs_nowake()
1241 WARN_ON_ONCE(rcu_advance_cbs(rnp, rdp)); in rcu_advance_cbs_nowake()
1264 static bool __note_gp_changes(struct rcu_node *rnp, struct rcu_data *rdp) in __note_gp_changes() argument
1268 const bool offloaded = rcu_rdp_is_offloaded(rdp); in __note_gp_changes()
1272 if (rdp->gp_seq == rnp->gp_seq) in __note_gp_changes()
1276 if (rcu_seq_completed_gp(rdp->gp_seq, rnp->gp_seq) || in __note_gp_changes()
1277 unlikely(rdp->gpwrap)) { in __note_gp_changes()
1279 ret = rcu_advance_cbs(rnp, rdp); /* Advance CBs. */ in __note_gp_changes()
1280 rdp->core_needs_qs = false; in __note_gp_changes()
1281 trace_rcu_grace_period(rcu_state.name, rdp->gp_seq, TPS("cpuend")); in __note_gp_changes()
1284 ret = rcu_accelerate_cbs(rnp, rdp); /* Recent CBs. */ in __note_gp_changes()
1285 if (rdp->core_needs_qs) in __note_gp_changes()
1286 rdp->core_needs_qs = !!(rnp->qsmask & rdp->grpmask); in __note_gp_changes()
1290 if (rcu_seq_new_gp(rdp->gp_seq, rnp->gp_seq) || in __note_gp_changes()
1291 unlikely(rdp->gpwrap)) { in __note_gp_changes()
1298 need_qs = !!(rnp->qsmask & rdp->grpmask); in __note_gp_changes()
1299 rdp->cpu_no_qs.b.norm = need_qs; in __note_gp_changes()
1300 rdp->core_needs_qs = need_qs; in __note_gp_changes()
1301 zero_cpu_stall_ticks(rdp); in __note_gp_changes()
1303 rdp->gp_seq = rnp->gp_seq; /* Remember new grace-period state. */ in __note_gp_changes()
1304 if (ULONG_CMP_LT(rdp->gp_seq_needed, rnp->gp_seq_needed) || rdp->gpwrap) in __note_gp_changes()
1305 WRITE_ONCE(rdp->gp_seq_needed, rnp->gp_seq_needed); in __note_gp_changes()
1306 if (IS_ENABLED(CONFIG_PROVE_RCU) && rdp->gpwrap) in __note_gp_changes()
1307 WRITE_ONCE(rdp->last_sched_clock, jiffies); in __note_gp_changes()
1308 WRITE_ONCE(rdp->gpwrap, false); in __note_gp_changes()
1309 rcu_gpnum_ovf(rnp, rdp); in __note_gp_changes()
1313 static void note_gp_changes(struct rcu_data *rdp) in note_gp_changes() argument
1320 rnp = rdp->mynode; in note_gp_changes()
1321 if ((rdp->gp_seq == rcu_seq_current(&rnp->gp_seq) && in note_gp_changes()
1322 !unlikely(READ_ONCE(rdp->gpwrap))) || /* w/out lock. */ in note_gp_changes()
1327 needwake = __note_gp_changes(rnp, rdp); in note_gp_changes()
1798 struct rcu_data *rdp; in rcu_gp_init() local
1924 rdp = this_cpu_ptr(&rcu_data); in rcu_gp_init()
1928 if (rnp == rdp->mynode) in rcu_gp_init()
1929 (void)__note_gp_changes(rnp, rdp); in rcu_gp_init()
2108 struct rcu_data *rdp; in rcu_gp_cleanup() local
2149 rdp = this_cpu_ptr(&rcu_data); in rcu_gp_cleanup()
2150 if (rnp == rdp->mynode) in rcu_gp_cleanup()
2151 needgp = __note_gp_changes(rnp, rdp) || needgp; in rcu_gp_cleanup()
2157 rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_gp_cleanup()
2158 check_cb_ovld_locked(rdp, rnp); in rcu_gp_cleanup()
2176 rdp = this_cpu_ptr(&rcu_data); in rcu_gp_cleanup()
2178 trace_rcu_this_gp(rnp, rdp, rnp->gp_seq_needed, in rcu_gp_cleanup()
2183 offloaded = rcu_rdp_is_offloaded(rdp); in rcu_gp_cleanup()
2184 if ((offloaded || !rcu_accelerate_cbs(rnp, rdp)) && needgp) { in rcu_gp_cleanup()
2394 rcu_report_qs_rdp(struct rcu_data *rdp) in rcu_report_qs_rdp() argument
2400 WARN_ON_ONCE(rdp->cpu != smp_processor_id()); in rcu_report_qs_rdp()
2401 rnp = rdp->mynode; in rcu_report_qs_rdp()
2403 if (rdp->cpu_no_qs.b.norm || rdp->gp_seq != rnp->gp_seq || in rcu_report_qs_rdp()
2404 rdp->gpwrap) { in rcu_report_qs_rdp()
2412 rdp->cpu_no_qs.b.norm = true; /* need qs for new gp. */ in rcu_report_qs_rdp()
2416 mask = rdp->grpmask; in rcu_report_qs_rdp()
2417 rdp->core_needs_qs = false; in rcu_report_qs_rdp()
2427 if (!rcu_rdp_is_offloaded(rdp)) { in rcu_report_qs_rdp()
2433 WARN_ON_ONCE(rcu_accelerate_cbs(rnp, rdp)); in rcu_report_qs_rdp()
2436 rcu_disable_urgency_upon_qs(rdp); in rcu_report_qs_rdp()
2449 rcu_check_quiescent_state(struct rcu_data *rdp) in rcu_check_quiescent_state() argument
2452 note_gp_changes(rdp); in rcu_check_quiescent_state()
2458 if (!rdp->core_needs_qs) in rcu_check_quiescent_state()
2465 if (rdp->cpu_no_qs.b.norm) in rcu_check_quiescent_state()
2472 rcu_report_qs_rdp(rdp); in rcu_check_quiescent_state()
2491 static void rcu_do_batch(struct rcu_data *rdp) in rcu_do_batch() argument
2506 if (!rcu_segcblist_ready_cbs(&rdp->cblist)) { in rcu_do_batch()
2508 rcu_segcblist_n_cbs(&rdp->cblist), 0); in rcu_do_batch()
2510 !rcu_segcblist_empty(&rdp->cblist), in rcu_do_batch()
2512 rcu_is_callbacks_kthread(rdp)); in rcu_do_batch()
2527 rcu_nocb_lock_irqsave(rdp, flags); in rcu_do_batch()
2529 pending = rcu_segcblist_get_seglen(&rdp->cblist, RCU_DONE_TAIL); in rcu_do_batch()
2532 bl = max(rdp->blimit, pending >> div); in rcu_do_batch()
2533 if ((in_serving_softirq() || rdp->rcu_cpu_kthread_status == RCU_KTHREAD_RUNNING) && in rcu_do_batch()
2544 rcu_segcblist_n_cbs(&rdp->cblist), bl); in rcu_do_batch()
2545 rcu_segcblist_extract_done_cbs(&rdp->cblist, &rcl); in rcu_do_batch()
2546 if (rcu_rdp_is_offloaded(rdp)) in rcu_do_batch()
2547 rdp->qlen_last_fqs_check = rcu_segcblist_n_cbs(&rdp->cblist); in rcu_do_batch()
2549 trace_rcu_segcb_stats(&rdp->cblist, TPS("SegCbDequeued")); in rcu_do_batch()
2550 rcu_nocb_unlock_irqrestore(rdp, flags); in rcu_do_batch()
2594 if (rdp->rcu_cpu_kthread_status == RCU_KTHREAD_RUNNING && in rcu_do_batch()
2596 rdp->rcu_cpu_has_work = 1; in rcu_do_batch()
2602 rcu_nocb_lock_irqsave(rdp, flags); in rcu_do_batch()
2603 rdp->n_cbs_invoked += count; in rcu_do_batch()
2605 is_idle_task(current), rcu_is_callbacks_kthread(rdp)); in rcu_do_batch()
2608 rcu_segcblist_insert_done_cbs(&rdp->cblist, &rcl); in rcu_do_batch()
2609 rcu_segcblist_add_len(&rdp->cblist, -count); in rcu_do_batch()
2612 count = rcu_segcblist_n_cbs(&rdp->cblist); in rcu_do_batch()
2613 if (rdp->blimit >= DEFAULT_MAX_RCU_BLIMIT && count <= qlowmark) in rcu_do_batch()
2614 rdp->blimit = blimit; in rcu_do_batch()
2617 if (count == 0 && rdp->qlen_last_fqs_check != 0) { in rcu_do_batch()
2618 rdp->qlen_last_fqs_check = 0; in rcu_do_batch()
2619 rdp->n_force_qs_snap = READ_ONCE(rcu_state.n_force_qs); in rcu_do_batch()
2620 } else if (count < rdp->qlen_last_fqs_check - qhimark) in rcu_do_batch()
2621 rdp->qlen_last_fqs_check = count; in rcu_do_batch()
2627 empty = rcu_segcblist_empty(&rdp->cblist); in rcu_do_batch()
2631 WARN_ON_ONCE(count == 0 && rcu_segcblist_n_segment_cbs(&rdp->cblist) != 0); in rcu_do_batch()
2632 WARN_ON_ONCE(!empty && rcu_segcblist_n_segment_cbs(&rdp->cblist) == 0); in rcu_do_batch()
2634 rcu_nocb_unlock_irqrestore(rdp, flags); in rcu_do_batch()
2685 static void force_qs_rnp(int (*f)(struct rcu_data *rdp)) in force_qs_rnp() argument
2715 struct rcu_data *rdp; in force_qs_rnp() local
2718 rdp = per_cpu_ptr(&rcu_data, cpu); in force_qs_rnp()
2719 ret = f(rdp); in force_qs_rnp()
2721 mask |= rdp->grpmask; in force_qs_rnp()
2722 rcu_disable_urgency_upon_qs(rdp); in force_qs_rnp()
2725 rsmask |= rdp->grpmask; in force_qs_rnp()
2791 struct rcu_data *rdp = raw_cpu_ptr(&rcu_data); in rcu_core() local
2792 struct rcu_node *rnp = rdp->mynode; in rcu_core()
2797 WARN_ON_ONCE(!rdp->beenonline); in rcu_core()
2808 rcu_check_quiescent_state(rdp); in rcu_core()
2812 rcu_segcblist_is_enabled(&rdp->cblist) && !rcu_rdp_is_offloaded(rdp)) { in rcu_core()
2814 if (!rcu_segcblist_restempty(&rdp->cblist, RCU_NEXT_READY_TAIL)) in rcu_core()
2815 rcu_accelerate_cbs_unlocked(rnp, rdp); in rcu_core()
2819 rcu_check_gp_start_stall(rnp, rdp, rcu_jiffies_till_stall_check()); in rcu_core()
2822 if (!rcu_rdp_is_offloaded(rdp) && rcu_segcblist_ready_cbs(&rdp->cblist) && in rcu_core()
2824 rcu_do_batch(rdp); in rcu_core()
2826 if (rcu_segcblist_ready_cbs(&rdp->cblist)) in rcu_core()
2831 do_nocb_deferred_wakeup(rdp); in rcu_core()
2836 queue_work_on(rdp->cpu, rcu_gp_wq, &rdp->strict_work); in rcu_core()
2953 static void rcutree_enqueue(struct rcu_data *rdp, struct rcu_head *head, rcu_callback_t func) in rcutree_enqueue() argument
2955 rcu_segcblist_enqueue(&rdp->cblist, head); in rcutree_enqueue()
2957 rcu_segcblist_n_cbs(&rdp->cblist)); in rcutree_enqueue()
2958 trace_rcu_segcb_stats(&rdp->cblist, TPS("SegCBQueued")); in rcutree_enqueue()
2964 static void call_rcu_core(struct rcu_data *rdp, struct rcu_head *head, in call_rcu_core() argument
2967 rcutree_enqueue(rdp, head, func); in call_rcu_core()
2986 if (unlikely(rcu_segcblist_n_cbs(&rdp->cblist) > in call_rcu_core()
2987 rdp->qlen_last_fqs_check + qhimark)) { in call_rcu_core()
2990 note_gp_changes(rdp); in call_rcu_core()
2994 rcu_accelerate_cbs_unlocked(rdp->mynode, rdp); in call_rcu_core()
2997 rdp->blimit = DEFAULT_MAX_RCU_BLIMIT; in call_rcu_core()
2998 if (READ_ONCE(rcu_state.n_force_qs) == rdp->n_force_qs_snap && in call_rcu_core()
2999 rcu_segcblist_first_pend_cb(&rdp->cblist) != head) in call_rcu_core()
3001 rdp->n_force_qs_snap = READ_ONCE(rcu_state.n_force_qs); in call_rcu_core()
3002 rdp->qlen_last_fqs_check = rcu_segcblist_n_cbs(&rdp->cblist); in call_rcu_core()
3020 static void check_cb_ovld_locked(struct rcu_data *rdp, struct rcu_node *rnp) in check_cb_ovld_locked() argument
3025 if (rcu_segcblist_n_cbs(&rdp->cblist) >= qovld_calc) in check_cb_ovld_locked()
3026 WRITE_ONCE(rnp->cbovldmask, rnp->cbovldmask | rdp->grpmask); in check_cb_ovld_locked()
3028 WRITE_ONCE(rnp->cbovldmask, rnp->cbovldmask & ~rdp->grpmask); in check_cb_ovld_locked()
3043 static void check_cb_ovld(struct rcu_data *rdp) in check_cb_ovld() argument
3045 struct rcu_node *const rnp = rdp->mynode; in check_cb_ovld()
3048 ((rcu_segcblist_n_cbs(&rdp->cblist) >= qovld_calc) == in check_cb_ovld()
3049 !!(READ_ONCE(rnp->cbovldmask) & rdp->grpmask))) in check_cb_ovld()
3052 check_cb_ovld_locked(rdp, rnp); in check_cb_ovld()
3062 struct rcu_data *rdp; in __call_rcu_common() local
3085 rdp = this_cpu_ptr(&rcu_data); in __call_rcu_common()
3086 RCU_LOCKDEP_WARN(!rcu_rdp_cpu_online(rdp), "Callback enqueued on offline CPU!"); in __call_rcu_common()
3091 if (unlikely(!rcu_segcblist_is_enabled(&rdp->cblist))) { in __call_rcu_common()
3097 if (rcu_segcblist_empty(&rdp->cblist)) in __call_rcu_common()
3098 rcu_segcblist_init(&rdp->cblist); in __call_rcu_common()
3101 check_cb_ovld(rdp); in __call_rcu_common()
3103 if (unlikely(rcu_rdp_is_offloaded(rdp))) in __call_rcu_common()
3104 call_rcu_nocb(rdp, head, func, flags, lazy); in __call_rcu_common()
3106 call_rcu_core(rdp, head, func, flags); in __call_rcu_common()
3413 struct rcu_data *rdp; in start_poll_synchronize_rcu_common() local
3417 rdp = this_cpu_ptr(&rcu_data); in start_poll_synchronize_rcu_common()
3418 rnp = rdp->mynode; in start_poll_synchronize_rcu_common()
3426 needwake = rcu_start_this_gp(rnp, rdp, rcu_seq_snap(&rcu_state.gp_seq)); in start_poll_synchronize_rcu_common()
3624 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); in rcu_pending() local
3625 struct rcu_node *rnp = rdp->mynode; in rcu_pending()
3630 check_cpu_stall(rdp); in rcu_pending()
3633 if (rcu_nocb_need_deferred_wakeup(rdp, RCU_NOCB_WAKE)) in rcu_pending()
3646 if (rdp->core_needs_qs && !rdp->cpu_no_qs.b.norm && gp_in_progress) in rcu_pending()
3650 if (!rcu_rdp_is_offloaded(rdp) && in rcu_pending()
3651 rcu_segcblist_ready_cbs(&rdp->cblist)) in rcu_pending()
3655 if (!gp_in_progress && rcu_segcblist_is_enabled(&rdp->cblist) && in rcu_pending()
3656 !rcu_rdp_is_offloaded(rdp) && in rcu_pending()
3657 !rcu_segcblist_restempty(&rdp->cblist, RCU_NEXT_READY_TAIL)) in rcu_pending()
3661 if (rcu_seq_current(&rnp->gp_seq) != rdp->gp_seq || in rcu_pending()
3662 unlikely(READ_ONCE(rdp->gpwrap))) /* outside lock */ in rcu_pending()
3705 static void rcu_barrier_entrain(struct rcu_data *rdp) in rcu_barrier_entrain() argument
3708 unsigned long lseq = READ_ONCE(rdp->barrier_seq_snap); in rcu_barrier_entrain()
3716 rdp->barrier_head.func = rcu_barrier_callback; in rcu_barrier_entrain()
3717 debug_rcu_head_queue(&rdp->barrier_head); in rcu_barrier_entrain()
3718 rcu_nocb_lock(rdp); in rcu_barrier_entrain()
3724 was_alldone = rcu_rdp_is_offloaded(rdp) && !rcu_segcblist_pend_cbs(&rdp->cblist); in rcu_barrier_entrain()
3725 WARN_ON_ONCE(!rcu_nocb_flush_bypass(rdp, NULL, jiffies, false)); in rcu_barrier_entrain()
3726 wake_nocb = was_alldone && rcu_segcblist_pend_cbs(&rdp->cblist); in rcu_barrier_entrain()
3727 if (rcu_segcblist_entrain(&rdp->cblist, &rdp->barrier_head)) { in rcu_barrier_entrain()
3730 debug_rcu_head_unqueue(&rdp->barrier_head); in rcu_barrier_entrain()
3733 rcu_nocb_unlock(rdp); in rcu_barrier_entrain()
3735 wake_nocb_gp(rdp, false); in rcu_barrier_entrain()
3736 smp_store_release(&rdp->barrier_seq_snap, gseq); in rcu_barrier_entrain()
3745 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_barrier_handler() local
3748 WARN_ON_ONCE(cpu != rdp->cpu); in rcu_barrier_handler()
3751 rcu_barrier_entrain(rdp); in rcu_barrier_handler()
3768 struct rcu_data *rdp; in rcu_barrier() local
3807 rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_barrier()
3809 if (smp_load_acquire(&rdp->barrier_seq_snap) == gseq) in rcu_barrier()
3812 if (!rcu_segcblist_n_cbs(&rdp->cblist)) { in rcu_barrier()
3813 WRITE_ONCE(rdp->barrier_seq_snap, gseq); in rcu_barrier()
3818 if (!rcu_rdp_cpu_online(rdp)) { in rcu_barrier()
3819 rcu_barrier_entrain(rdp); in rcu_barrier()
3820 WARN_ON_ONCE(READ_ONCE(rdp->barrier_seq_snap) != gseq); in rcu_barrier()
3830 WARN_ON_ONCE(READ_ONCE(rdp->barrier_seq_snap) != gseq); in rcu_barrier()
3849 rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_barrier()
3851 WRITE_ONCE(rdp->barrier_seq_snap, gseq); in rcu_barrier()
3951 static bool rcu_rdp_cpu_online(struct rcu_data *rdp) in rcu_rdp_cpu_online() argument
3953 return !!(rdp->grpmask & rcu_rnp_online_cpus(rdp->mynode)); in rcu_rdp_cpu_online()
3958 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_cpu_online() local
3960 return rcu_rdp_cpu_online(rdp); in rcu_cpu_online()
3980 struct rcu_data *rdp; in rcu_lockdep_current_cpu_online() local
3986 rdp = this_cpu_ptr(&rcu_data); in rcu_lockdep_current_cpu_online()
3994 if (rcu_rdp_cpu_online(rdp) || arch_spin_is_locked(&rcu_state.ofl_lock)) in rcu_lockdep_current_cpu_online()
4090 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_boot_init_percpu_data() local
4093 rdp->grpmask = leaf_node_cpu_bit(rdp->mynode, cpu); in rcu_boot_init_percpu_data()
4094 INIT_WORK(&rdp->strict_work, strict_work_handler); in rcu_boot_init_percpu_data()
4097 rdp->barrier_seq_snap = rcu_state.barrier_sequence; in rcu_boot_init_percpu_data()
4098 rdp->rcu_ofl_gp_seq = rcu_state.gp_seq; in rcu_boot_init_percpu_data()
4099 rdp->rcu_ofl_gp_state = RCU_GP_CLEANED; in rcu_boot_init_percpu_data()
4100 rdp->rcu_onl_gp_seq = rcu_state.gp_seq; in rcu_boot_init_percpu_data()
4101 rdp->rcu_onl_gp_state = RCU_GP_CLEANED; in rcu_boot_init_percpu_data()
4102 rdp->last_sched_clock = jiffies; in rcu_boot_init_percpu_data()
4103 rdp->cpu = cpu; in rcu_boot_init_percpu_data()
4104 rcu_boot_init_nocb_percpu_data(rdp); in rcu_boot_init_percpu_data()
4190 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcutree_prepare_cpu() local
4195 rdp->qlen_last_fqs_check = 0; in rcutree_prepare_cpu()
4196 rdp->n_force_qs_snap = READ_ONCE(rcu_state.n_force_qs); in rcutree_prepare_cpu()
4197 rdp->blimit = blimit; in rcutree_prepare_cpu()
4205 if (!rcu_segcblist_is_enabled(&rdp->cblist)) in rcutree_prepare_cpu()
4206 rcu_segcblist_init(&rdp->cblist); /* Re-enable callbacks. */ in rcutree_prepare_cpu()
4213 rnp = rdp->mynode; in rcutree_prepare_cpu()
4215 rdp->gp_seq = READ_ONCE(rnp->gp_seq); in rcutree_prepare_cpu()
4216 rdp->gp_seq_needed = rdp->gp_seq; in rcutree_prepare_cpu()
4217 rdp->cpu_no_qs.b.norm = true; in rcutree_prepare_cpu()
4218 rdp->core_needs_qs = false; in rcutree_prepare_cpu()
4219 rdp->rcu_iw_pending = false; in rcutree_prepare_cpu()
4220 rdp->rcu_iw = IRQ_WORK_INIT_HARD(rcu_iw_handler); in rcutree_prepare_cpu()
4221 rdp->rcu_iw_gp_seq = rdp->gp_seq - 1; in rcutree_prepare_cpu()
4222 trace_rcu_grace_period(rcu_state.name, rdp->gp_seq, TPS("cpuonl")); in rcutree_prepare_cpu()
4237 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcu_cpu_beenfullyonline() local
4239 return smp_load_acquire(&rdp->beenonline); in rcu_cpu_beenfullyonline()
4249 struct rcu_data *rdp; in rcutree_online_cpu() local
4252 rdp = per_cpu_ptr(&rcu_data, cpu); in rcutree_online_cpu()
4253 rnp = rdp->mynode; in rcutree_online_cpu()
4255 rnp->ffmask |= rdp->grpmask; in rcutree_online_cpu()
4283 struct rcu_data *rdp; in rcutree_report_cpu_starting() local
4288 rdp = per_cpu_ptr(&rcu_data, cpu); in rcutree_report_cpu_starting()
4289 if (rdp->cpu_started) in rcutree_report_cpu_starting()
4291 rdp->cpu_started = true; in rcutree_report_cpu_starting()
4293 rnp = rdp->mynode; in rcutree_report_cpu_starting()
4294 mask = rdp->grpmask; in rcutree_report_cpu_starting()
4306 rcu_gpnum_ovf(rnp, rdp); /* Offline-induced counter wrap? */ in rcutree_report_cpu_starting()
4307 rdp->rcu_onl_gp_seq = READ_ONCE(rcu_state.gp_seq); in rcutree_report_cpu_starting()
4308 rdp->rcu_onl_gp_state = READ_ONCE(rcu_state.gp_state); in rcutree_report_cpu_starting()
4316 rcu_disable_urgency_upon_qs(rdp); in rcutree_report_cpu_starting()
4323 smp_store_release(&rdp->beenonline, true); in rcutree_report_cpu_starting()
4341 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); in rcutree_report_cpu_dead() local
4342 struct rcu_node *rnp = rdp->mynode; /* Outgoing CPU's rdp & rnp. */ in rcutree_report_cpu_dead()
4350 do_nocb_deferred_wakeup(rdp); in rcutree_report_cpu_dead()
4355 mask = rdp->grpmask; in rcutree_report_cpu_dead()
4358 rdp->rcu_ofl_gp_seq = READ_ONCE(rcu_state.gp_seq); in rcutree_report_cpu_dead()
4359 rdp->rcu_ofl_gp_state = READ_ONCE(rcu_state.gp_state); in rcutree_report_cpu_dead()
4362 rcu_disable_urgency_upon_qs(rdp); in rcutree_report_cpu_dead()
4369 rdp->cpu_started = false; in rcutree_report_cpu_dead()
4383 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcutree_migrate_callbacks() local
4386 if (rcu_rdp_is_offloaded(rdp)) in rcutree_migrate_callbacks()
4390 if (rcu_segcblist_empty(&rdp->cblist)) { in rcutree_migrate_callbacks()
4395 WARN_ON_ONCE(rcu_rdp_cpu_online(rdp)); in rcutree_migrate_callbacks()
4396 rcu_barrier_entrain(rdp); in rcutree_migrate_callbacks()
4403 needwake = rcu_advance_cbs(my_rnp, rdp) || in rcutree_migrate_callbacks()
4405 rcu_segcblist_merge(&my_rdp->cblist, &rdp->cblist); in rcutree_migrate_callbacks()
4408 rcu_segcblist_disable(&rdp->cblist); in rcutree_migrate_callbacks()
4422 WARN_ONCE(rcu_segcblist_n_cbs(&rdp->cblist) != 0 || in rcutree_migrate_callbacks()
4423 !rcu_segcblist_empty(&rdp->cblist), in rcutree_migrate_callbacks()
4425 cpu, rcu_segcblist_n_cbs(&rdp->cblist), in rcutree_migrate_callbacks()
4426 rcu_segcblist_first_cb(&rdp->cblist)); in rcutree_migrate_callbacks()
4451 struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); in rcutree_dying_cpu() local
4452 struct rcu_node *rnp = rdp->mynode; in rcutree_dying_cpu()
4454 blkd = !!(READ_ONCE(rnp->qsmask) & rdp->grpmask); in rcutree_dying_cpu()
4467 struct rcu_data *rdp; in rcutree_offline_cpu() local
4470 rdp = per_cpu_ptr(&rcu_data, cpu); in rcutree_offline_cpu()
4471 rnp = rdp->mynode; in rcutree_offline_cpu()
4473 rnp->ffmask &= ~rdp->grpmask; in rcutree_offline_cpu()
4515 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); in rcu_spawn_gp_kthread() local
4540 rcu_spawn_rnp_kthreads(rdp->mynode); in rcu_spawn_gp_kthread()