module_param(qhimark, int, 0);
module_param(qlowmark, int, 0);
-int rcu_cpu_stall_suppress __read_mostly;
+int rcu_cpu_stall_suppress __read_mostly; /* 1 = suppress stall warnings. */
+int rcu_cpu_stall_timeout __read_mostly = CONFIG_RCU_CPU_STALL_TIMEOUT;
+
module_param(rcu_cpu_stall_suppress, int, 0644);
+module_param(rcu_cpu_stall_timeout, int, 0644);
static void force_quiescent_state(struct rcu_state *rsp, int relaxed);
static int rcu_pending(int cpu);
return &rsp->node[0];
}
-#ifdef CONFIG_SMP
-
/*
* If the specified CPU is offline, tell the caller that it is in
* a quiescent state. Otherwise, whack it with a reschedule IPI.
return 0;
}
-#endif /* #ifdef CONFIG_SMP */
-
/*
* rcu_idle_enter_common - inform RCU that current CPU is moving towards idle
*
atomic_inc(&rdtp->dynticks);
smp_mb__after_atomic_inc(); /* Force ordering with next sojourn. */
WARN_ON_ONCE(atomic_read(&rdtp->dynticks) & 0x1);
+
+ /*
+ * The idle task is not permitted to enter the idle loop while
+ * in an RCU read-side critical section.
+ */
+ rcu_lockdep_assert(!lock_is_held(&rcu_lock_map),
+ "Illegal idle entry in RCU read-side critical section.");
+ rcu_lockdep_assert(!lock_is_held(&rcu_bh_lock_map),
+ "Illegal idle entry in RCU-bh read-side critical section.");
+ rcu_lockdep_assert(!lock_is_held(&rcu_sched_lock_map),
+ "Illegal idle entry in RCU-sched read-side critical section.");
}
/**
return __get_cpu_var(rcu_dynticks).dynticks_nesting <= 1;
}
-#ifdef CONFIG_SMP
-
/*
* Snapshot the specified CPU's dynticks counter so that we can later
* credit them with an implicit quiescent state. Return 1 if this CPU
return rcu_implicit_offline_qs(rdp);
}
-#endif /* #ifdef CONFIG_SMP */
+static int jiffies_till_stall_check(void)
+{
+ int till_stall_check = ACCESS_ONCE(rcu_cpu_stall_timeout);
+
+ /*
+ * Limit check must be consistent with the Kconfig limits
+ * for CONFIG_RCU_CPU_STALL_TIMEOUT.
+ */
+ if (till_stall_check < 3) {
+ ACCESS_ONCE(rcu_cpu_stall_timeout) = 3;
+ till_stall_check = 3;
+ } else if (till_stall_check > 300) {
+ ACCESS_ONCE(rcu_cpu_stall_timeout) = 300;
+ till_stall_check = 300;
+ }
+ return till_stall_check * HZ + RCU_STALL_DELAY_DELTA;
+}
static void record_gp_stall_check_time(struct rcu_state *rsp)
{
rsp->gp_start = jiffies;
- rsp->jiffies_stall = jiffies + RCU_SECONDS_TILL_STALL_CHECK;
+ rsp->jiffies_stall = jiffies + jiffies_till_stall_check();
}
static void print_other_cpu_stall(struct rcu_state *rsp)
raw_spin_unlock_irqrestore(&rnp->lock, flags);
return;
}
- rsp->jiffies_stall = jiffies + RCU_SECONDS_TILL_STALL_RECHECK;
-
- /*
- * Now rat on any tasks that got kicked up to the root rcu_node
- * due to CPU offlining.
- */
- ndetected = rcu_print_task_stall(rnp);
+ rsp->jiffies_stall = jiffies + 3 * jiffies_till_stall_check() + 3;
raw_spin_unlock_irqrestore(&rnp->lock, flags);
/*
* See Documentation/RCU/stallwarn.txt for info on how to debug
* RCU CPU stall warnings.
*/
- printk(KERN_ERR "INFO: %s detected stalls on CPUs/tasks: {",
+ printk(KERN_ERR "INFO: %s detected stalls on CPUs/tasks:",
rsp->name);
+ print_cpu_stall_info_begin();
rcu_for_each_leaf_node(rsp, rnp) {
raw_spin_lock_irqsave(&rnp->lock, flags);
ndetected += rcu_print_task_stall(rnp);
continue;
for (cpu = 0; cpu <= rnp->grphi - rnp->grplo; cpu++)
if (rnp->qsmask & (1UL << cpu)) {
- printk(" %d", rnp->grplo + cpu);
+ print_cpu_stall_info(rsp, rnp->grplo + cpu);
ndetected++;
}
}
- printk("} (detected by %d, t=%ld jiffies)\n",
+
+ /*
+ * Now rat on any tasks that got kicked up to the root rcu_node
+ * due to CPU offlining.
+ */
+ rnp = rcu_get_root(rsp);
+ raw_spin_lock_irqsave(&rnp->lock, flags);
+ ndetected = rcu_print_task_stall(rnp);
+ raw_spin_unlock_irqrestore(&rnp->lock, flags);
+
+ print_cpu_stall_info_end();
+ printk(KERN_CONT "(detected by %d, t=%ld jiffies)\n",
smp_processor_id(), (long)(jiffies - rsp->gp_start));
if (ndetected == 0)
printk(KERN_ERR "INFO: Stall ended before state dump start\n");
* See Documentation/RCU/stallwarn.txt for info on how to debug
* RCU CPU stall warnings.
*/
- printk(KERN_ERR "INFO: %s detected stall on CPU %d (t=%lu jiffies)\n",
- rsp->name, smp_processor_id(), jiffies - rsp->gp_start);
+ printk(KERN_ERR "INFO: %s self-detected stall on CPU", rsp->name);
+ print_cpu_stall_info_begin();
+ print_cpu_stall_info(rsp, smp_processor_id());
+ print_cpu_stall_info_end();
+ printk(KERN_CONT " (t=%lu jiffies)\n", jiffies - rsp->gp_start);
if (!trigger_all_cpu_backtrace())
dump_stack();
raw_spin_lock_irqsave(&rnp->lock, flags);
if (ULONG_CMP_GE(jiffies, rsp->jiffies_stall))
- rsp->jiffies_stall =
- jiffies + RCU_SECONDS_TILL_STALL_RECHECK;
+ rsp->jiffies_stall = jiffies +
+ 3 * jiffies_till_stall_check() + 3;
raw_spin_unlock_irqrestore(&rnp->lock, flags);
set_need_resched(); /* kick ourselves to get things going. */
rdp->passed_quiesce = 0;
} else
rdp->qs_pending = 0;
+ zero_cpu_stall_ticks(rdp);
}
}
* in preparation for detecting the next grace period. The caller must hold
* the root node's ->lock, which is released before return. Hard irqs must
* be disabled.
+ *
+ * Note that it is legal for a dying CPU (which is marked as offline) to
+ * invoke this function. This can happen when the dying CPU reports its
+ * quiescent state.
*/
static void
rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
rsp->fqs_state = RCU_GP_INIT; /* Hold off force_quiescent_state. */
rsp->jiffies_force_qs = jiffies + RCU_JIFFIES_TILL_FORCE_QS;
record_gp_stall_check_time(rsp);
-
- /* Special-case the common single-level case. */
- if (NUM_RCU_NODES == 1) {
- rcu_preempt_check_blocked_tasks(rnp);
- rnp->qsmask = rnp->qsmaskinit;
- rnp->gpnum = rsp->gpnum;
- rnp->completed = rsp->completed;
- rsp->fqs_state = RCU_SIGNAL_INIT; /* force_quiescent_state OK */
- rcu_start_gp_per_cpu(rsp, rnp, rdp);
- rcu_preempt_boost_start_gp(rnp);
- trace_rcu_grace_period_init(rsp->name, rnp->gpnum,
- rnp->level, rnp->grplo,
- rnp->grphi, rnp->qsmask);
- raw_spin_unlock_irqrestore(&rnp->lock, flags);
- return;
- }
-
raw_spin_unlock(&rnp->lock); /* leave irqs disabled. */
-
/* Exclude any concurrent CPU-hotplug operations. */
raw_spin_lock(&rsp->onofflock); /* irqs already disabled. */
/*
* Move a dying CPU's RCU callbacks to online CPU's callback list.
- * Synchronization is not required because this function executes
- * in stop_machine() context.
+ * Also record a quiescent state for this CPU for the current grace period.
+ * Synchronization and interrupt disabling are not required because
+ * this function executes in stop_machine() context. Therefore, cleanup
+ * operations that might block must be done later from the CPU_DEAD
+ * notifier.
+ *
+ * Note that the outgoing CPU's bit has already been cleared in the
+ * cpu_online_mask. This allows us to randomly pick a callback
+ * destination from the bits set in that mask.
*/
-static void rcu_send_cbs_to_online(struct rcu_state *rsp)
+static void rcu_cleanup_dying_cpu(struct rcu_state *rsp)
{
+ unsigned long flags;
int i;
- /* current DYING CPU is cleared in the cpu_online_mask */
+ unsigned long mask;
+ int need_report;
int receive_cpu = cpumask_any(cpu_online_mask);
struct rcu_data *rdp = this_cpu_ptr(rsp->rda);
struct rcu_data *receive_rdp = per_cpu_ptr(rsp->rda, receive_cpu);
+ struct rcu_node *rnp = rdp->mynode; /* For dying CPU. */
+
+ /* First, adjust the counts. */
+ if (rdp->nxtlist != NULL) {
+ receive_rdp->qlen_lazy += rdp->qlen_lazy;
+ receive_rdp->qlen += rdp->qlen;
+ rdp->qlen_lazy = 0;
+ rdp->qlen = 0;
+ }
- if (rdp->nxtlist == NULL)
- return; /* irqs disabled, so comparison is stable. */
-
- *receive_rdp->nxttail[RCU_NEXT_TAIL] = rdp->nxtlist;
- receive_rdp->nxttail[RCU_NEXT_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
- receive_rdp->qlen += rdp->qlen;
- receive_rdp->n_cbs_adopted += rdp->qlen;
- rdp->n_cbs_orphaned += rdp->qlen;
-
- rdp->nxtlist = NULL;
- for (i = 0; i < RCU_NEXT_SIZE; i++)
- rdp->nxttail[i] = &rdp->nxtlist;
- rdp->qlen = 0;
-}
-
-/*
- * Remove the outgoing CPU from the bitmasks in the rcu_node hierarchy
- * and move all callbacks from the outgoing CPU to the current one.
- * There can only be one CPU hotplug operation at a time, so no other
- * CPU can be attempting to update rcu_cpu_kthread_task.
- */
-static void __rcu_offline_cpu(int cpu, struct rcu_state *rsp)
-{
- unsigned long flags;
- unsigned long mask;
- int need_report = 0;
- struct rcu_data *rdp = per_cpu_ptr(rsp->rda, cpu);
- struct rcu_node *rnp;
-
- rcu_stop_cpu_kthread(cpu);
+ /*
+ * Next, move ready-to-invoke callbacks to be invoked on some
+ * other CPU. These will not be required to pass through another
+ * grace period: They are done, regardless of CPU.
+ */
+ if (rdp->nxtlist != NULL &&
+ rdp->nxttail[RCU_DONE_TAIL] != &rdp->nxtlist) {
+ struct rcu_head *oldhead;
+ struct rcu_head **oldtail;
+ struct rcu_head **newtail;
+
+ oldhead = rdp->nxtlist;
+ oldtail = receive_rdp->nxttail[RCU_DONE_TAIL];
+ rdp->nxtlist = *rdp->nxttail[RCU_DONE_TAIL];
+ *rdp->nxttail[RCU_DONE_TAIL] = *oldtail;
+ *receive_rdp->nxttail[RCU_DONE_TAIL] = oldhead;
+ newtail = rdp->nxttail[RCU_DONE_TAIL];
+ for (i = RCU_DONE_TAIL; i < RCU_NEXT_SIZE; i++) {
+ if (receive_rdp->nxttail[i] == oldtail)
+ receive_rdp->nxttail[i] = newtail;
+ if (rdp->nxttail[i] == newtail)
+ rdp->nxttail[i] = &rdp->nxtlist;
+ }
+ }
- /* Exclude any attempts to start a new grace period. */
- raw_spin_lock_irqsave(&rsp->onofflock, flags);
+ /*
+ * Finally, put the rest of the callbacks at the end of the list.
+ * The ones that made it partway through get to start over: We
+ * cannot assume that grace periods are synchronized across CPUs.
+ * (We could splice RCU_WAIT_TAIL into RCU_NEXT_READY_TAIL, but
+ * this does not seem compelling. Not yet, anyway.)
+ */
+ if (rdp->nxtlist != NULL) {
+ *receive_rdp->nxttail[RCU_NEXT_TAIL] = rdp->nxtlist;
+ receive_rdp->nxttail[RCU_NEXT_TAIL] =
+ rdp->nxttail[RCU_NEXT_TAIL];
+ receive_rdp->n_cbs_adopted += rdp->qlen;
+ rdp->n_cbs_orphaned += rdp->qlen;
+
+ rdp->nxtlist = NULL;
+ for (i = 0; i < RCU_NEXT_SIZE; i++)
+ rdp->nxttail[i] = &rdp->nxtlist;
+ }
- /* Remove the outgoing CPU from the masks in the rcu_node hierarchy. */
- rnp = rdp->mynode; /* this is the outgoing CPU's rnp. */
+ /*
+ * Record a quiescent state for the dying CPU. This is safe
+ * only because we have already cleared out the callbacks.
+ * (Otherwise, the RCU core might try to schedule the invocation
+ * of callbacks on this now-offline CPU, which would be bad.)
+ */
mask = rdp->grpmask; /* rnp->grplo is constant. */
+ trace_rcu_grace_period(rsp->name,
+ rnp->gpnum + 1 - !!(rnp->qsmask & mask),
+ "cpuofl");
+ rcu_report_qs_rdp(smp_processor_id(), rsp, rdp, rsp->gpnum);
+ /* Note that rcu_report_qs_rdp() might call trace_rcu_grace_period(). */
+
+ /*
+ * Remove the dying CPU from the bitmasks in the rcu_node
+ * hierarchy. Because we are in stop_machine() context, we
+ * automatically exclude ->onofflock critical sections.
+ */
do {
- raw_spin_lock(&rnp->lock); /* irqs already disabled. */
+ raw_spin_lock_irqsave(&rnp->lock, flags);
rnp->qsmaskinit &= ~mask;
if (rnp->qsmaskinit != 0) {
- if (rnp != rdp->mynode)
- raw_spin_unlock(&rnp->lock); /* irqs remain disabled. */
- else
- trace_rcu_grace_period(rsp->name,
- rnp->gpnum + 1 -
- !!(rnp->qsmask & mask),
- "cpuofl");
+ raw_spin_unlock_irqrestore(&rnp->lock, flags);
break;
}
if (rnp == rdp->mynode) {
- trace_rcu_grace_period(rsp->name,
- rnp->gpnum + 1 -
- !!(rnp->qsmask & mask),
- "cpuofl");
need_report = rcu_preempt_offline_tasks(rsp, rnp, rdp);
+ if (need_report & RCU_OFL_TASKS_NORM_GP)
+ rcu_report_unblock_qs_rnp(rnp, flags);
+ else
+ raw_spin_unlock_irqrestore(&rnp->lock, flags);
+ if (need_report & RCU_OFL_TASKS_EXP_GP)
+ rcu_report_exp_rnp(rsp, rnp, true);
} else
- raw_spin_unlock(&rnp->lock); /* irqs remain disabled. */
+ raw_spin_unlock_irqrestore(&rnp->lock, flags);
mask = rnp->grpmask;
rnp = rnp->parent;
} while (rnp != NULL);
-
- /*
- * We still hold the leaf rcu_node structure lock here, and
- * irqs are still disabled. The reason for this subterfuge is
- * because invoking rcu_report_unblock_qs_rnp() with ->onofflock
- * held leads to deadlock.
- */
- raw_spin_unlock(&rsp->onofflock); /* irqs remain disabled. */
- rnp = rdp->mynode;
- if (need_report & RCU_OFL_TASKS_NORM_GP)
- rcu_report_unblock_qs_rnp(rnp, flags);
- else
- raw_spin_unlock_irqrestore(&rnp->lock, flags);
- if (need_report & RCU_OFL_TASKS_EXP_GP)
- rcu_report_exp_rnp(rsp, rnp, true);
- rcu_node_kthread_setaffinity(rnp, -1);
}
/*
- * Remove the specified CPU from the RCU hierarchy and move any pending
- * callbacks that it might have to the current CPU. This code assumes
- * that at least one CPU in the system will remain running at all times.
- * Any attempt to offline -all- CPUs is likely to strand RCU callbacks.
+ * The CPU has been completely removed, and some other CPU is reporting
+ * this fact from process context. Do the remainder of the cleanup.
+ * There can only be one CPU hotplug operation at a time, so no other
+ * CPU can be attempting to update rcu_cpu_kthread_task.
*/
-static void rcu_offline_cpu(int cpu)
+static void rcu_cleanup_dead_cpu(int cpu, struct rcu_state *rsp)
{
- __rcu_offline_cpu(cpu, &rcu_sched_state);
- __rcu_offline_cpu(cpu, &rcu_bh_state);
- rcu_preempt_offline_cpu(cpu);
+ struct rcu_data *rdp = per_cpu_ptr(rsp->rda, cpu);
+ struct rcu_node *rnp = rdp->mynode;
+
+ rcu_stop_cpu_kthread(cpu);
+ rcu_node_kthread_setaffinity(rnp, -1);
}
#else /* #ifdef CONFIG_HOTPLUG_CPU */
-static void rcu_send_cbs_to_online(struct rcu_state *rsp)
+static void rcu_cleanup_dying_cpu(struct rcu_state *rsp)
{
}
-static void rcu_offline_cpu(int cpu)
+static void rcu_cleanup_dead_cpu(int cpu, struct rcu_state *rsp)
{
}
{
unsigned long flags;
struct rcu_head *next, *list, **tail;
- int bl, count;
+ int bl, count, count_lazy;
/* If no callbacks are ready, just return.*/
if (!cpu_has_callbacks_ready_to_invoke(rdp)) {
- trace_rcu_batch_start(rsp->name, 0, 0);
+ trace_rcu_batch_start(rsp->name, rdp->qlen_lazy, rdp->qlen, 0);
trace_rcu_batch_end(rsp->name, 0, !!ACCESS_ONCE(rdp->nxtlist),
need_resched(), is_idle_task(current),
rcu_is_callbacks_kthread());
* races with call_rcu() from interrupt handlers.
*/
local_irq_save(flags);
+ WARN_ON_ONCE(cpu_is_offline(smp_processor_id()));
bl = rdp->blimit;
- trace_rcu_batch_start(rsp->name, rdp->qlen, bl);
+ trace_rcu_batch_start(rsp->name, rdp->qlen_lazy, rdp->qlen, bl);
list = rdp->nxtlist;
rdp->nxtlist = *rdp->nxttail[RCU_DONE_TAIL];
*rdp->nxttail[RCU_DONE_TAIL] = NULL;
local_irq_restore(flags);
/* Invoke callbacks. */
- count = 0;
+ count = count_lazy = 0;
while (list) {
next = list->next;
prefetch(next);
debug_rcu_head_unqueue(list);
- __rcu_reclaim(rsp->name, list);
+ if (__rcu_reclaim(rsp->name, list))
+ count_lazy++;
list = next;
/* Stop only if limit reached and CPU has something to do. */
if (++count >= bl &&
rcu_is_callbacks_kthread());
/* Update count, and requeue any remaining callbacks. */
+ rdp->qlen_lazy -= count_lazy;
rdp->qlen -= count;
rdp->n_cbs_invoked += count;
if (list != NULL) {
void rcu_check_callbacks(int cpu, int user)
{
trace_rcu_utilization("Start scheduler-tick");
+ increment_cpu_stall_ticks();
if (user || rcu_is_cpu_rrupt_from_idle()) {
/*
trace_rcu_utilization("End scheduler-tick");
}
-#ifdef CONFIG_SMP
-
/*
* Scan the leaf rcu_node structures, processing dyntick state for any that
* have not yet encountered a quiescent state, using the function specified.
trace_rcu_utilization("End fqs");
}
-#else /* #ifdef CONFIG_SMP */
-
-static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
-{
- set_need_resched();
-}
-
-#endif /* #else #ifdef CONFIG_SMP */
-
/*
* This does the RCU core processing work for the specified rcu_state
* and rcu_data structures. This may be called only from the CPU to
static void
__call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu),
- struct rcu_state *rsp)
+ struct rcu_state *rsp, bool lazy)
{
unsigned long flags;
struct rcu_data *rdp;
+ WARN_ON_ONCE((unsigned long)head & 0x3); /* Misaligned rcu_head! */
debug_rcu_head_queue(head);
head->func = func;
head->next = NULL;
* a quiescent state betweentimes.
*/
local_irq_save(flags);
+ WARN_ON_ONCE(cpu_is_offline(smp_processor_id()));
rdp = this_cpu_ptr(rsp->rda);
/* Add the callback to our list. */
*rdp->nxttail[RCU_NEXT_TAIL] = head;
rdp->nxttail[RCU_NEXT_TAIL] = &head->next;
rdp->qlen++;
+ if (lazy)
+ rdp->qlen_lazy++;
if (__is_kfree_rcu_offset((unsigned long)func))
trace_rcu_kfree_callback(rsp->name, head, (unsigned long)func,
- rdp->qlen);
+ rdp->qlen_lazy, rdp->qlen);
else
- trace_rcu_callback(rsp->name, head, rdp->qlen);
+ trace_rcu_callback(rsp->name, head, rdp->qlen_lazy, rdp->qlen);
/* If interrupts were disabled, don't dive into RCU core. */
if (irqs_disabled_flags(flags)) {
*/
void call_rcu_sched(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
{
- __call_rcu(head, func, &rcu_sched_state);
+ __call_rcu(head, func, &rcu_sched_state, 0);
}
EXPORT_SYMBOL_GPL(call_rcu_sched);
/*
- * Queue an RCU for invocation after a quicker grace period.
+ * Queue an RCU callback for invocation after a quicker grace period.
*/
void call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
{
- __call_rcu(head, func, &rcu_bh_state);
+ __call_rcu(head, func, &rcu_bh_state, 0);
}
EXPORT_SYMBOL_GPL(call_rcu_bh);
*/
void synchronize_sched(void)
{
+ rcu_lockdep_assert(!lock_is_held(&rcu_bh_lock_map) &&
+ !lock_is_held(&rcu_lock_map) &&
+ !lock_is_held(&rcu_sched_lock_map),
+ "Illegal synchronize_sched() in RCU-sched read-side critical section");
if (rcu_blocking_is_gp())
return;
wait_rcu_gp(call_rcu_sched);
*/
void synchronize_rcu_bh(void)
{
+ rcu_lockdep_assert(!lock_is_held(&rcu_bh_lock_map) &&
+ !lock_is_held(&rcu_lock_map) &&
+ !lock_is_held(&rcu_sched_lock_map),
+ "Illegal synchronize_rcu_bh() in RCU-bh read-side critical section");
if (rcu_blocking_is_gp())
return;
wait_rcu_gp(call_rcu_bh);
/* RCU callbacks either ready or pending? */
return per_cpu(rcu_sched_data, cpu).nxtlist ||
per_cpu(rcu_bh_data, cpu).nxtlist ||
- rcu_preempt_needs_cpu(cpu);
+ rcu_preempt_cpu_has_callbacks(cpu);
}
static DEFINE_PER_CPU(struct rcu_head, rcu_barrier_head) = {NULL};
rdp->nxtlist = NULL;
for (i = 0; i < RCU_NEXT_SIZE; i++)
rdp->nxttail[i] = &rdp->nxtlist;
+ rdp->qlen_lazy = 0;
rdp->qlen = 0;
rdp->dynticks = &per_cpu(rcu_dynticks, cpu);
WARN_ON_ONCE(rdp->dynticks->dynticks_nesting != DYNTICK_TASK_NESTING);
* touch any data without introducing corruption. We send the
* dying CPU's callbacks to an arbitrarily chosen online CPU.
*/
- rcu_send_cbs_to_online(&rcu_bh_state);
- rcu_send_cbs_to_online(&rcu_sched_state);
- rcu_preempt_send_cbs_to_online();
+ rcu_cleanup_dying_cpu(&rcu_bh_state);
+ rcu_cleanup_dying_cpu(&rcu_sched_state);
+ rcu_preempt_cleanup_dying_cpu();
rcu_cleanup_after_idle(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
- rcu_offline_cpu(cpu);
+ rcu_cleanup_dead_cpu(cpu, &rcu_bh_state);
+ rcu_cleanup_dead_cpu(cpu, &rcu_sched_state);
+ rcu_preempt_cleanup_dead_cpu(cpu);
break;
default:
break;
projects / deliverable / linux.git / blobdiff