scheduler changes for v4.7

index fa5b42d44985..3cc14dd8587c 100644
@@ -15,6 +15,7 @@
 
 #include <linux/compiler.h>
 #include <linux/sched.h>
+#include <linux/preempt.h>
 #include <asm/cacheflush.h>
 #include <asm/cachetype.h>
 #include <asm/proc-fns.h>

@@ -66,6 +67,7 @@ static inline void check_and_switch_context(struct mm_struct *mm,
 		cpu_switch_mm(mm->pgd, mm);
 }
 
+#ifndef MODULE
 #define finish_arch_post_lock_switch \
 	finish_arch_post_lock_switch
 static inline void finish_arch_post_lock_switch(void)

@@ -87,6 +89,7 @@ static inline void finish_arch_post_lock_switch(void)
 		preempt_enable_no_resched();
 	}
 }
+#endif /* !MODULE */
 
 #endif	/* CONFIG_MMU */
 

index 8cac1eb41466..55c924b65f71 100644
@@ -565,7 +565,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 		smp_ops->give_timebase();
 
 	/* Wait until cpu puts itself in the online & active maps */
-	while (!cpu_online(cpu) || !cpu_active(cpu))
+	while (!cpu_online(cpu))
 		cpu_relax();
 
 	return 0;

index 40a6b4f9c36c..7b89a7572100 100644
@@ -832,7 +832,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 	pcpu_attach_task(pcpu, tidle);
 	pcpu_start_fn(pcpu, smp_start_secondary, NULL);
 	/* Wait until cpu puts itself in the online & active maps */
-	while (!cpu_online(cpu) || !cpu_active(cpu))
+	while (!cpu_online(cpu))
 		cpu_relax();
 	return 0;
 }

index 041e442a3e28..dd39fde66b54 100644
@@ -2177,7 +2177,7 @@ void arch_perf_update_userpage(struct perf_event *event,
 	 * cap_user_time_zero doesn't make sense when we're using a different
 	 * time base for the records.
 	 */
-	if (event->clock == &local_clock) {
+	if (!event->attr.use_clockid) {
 		userpg->cap_user_time_zero = 1;
 		userpg->time_zero = data->cyc2ns_offset;
 	}

108 lines not on this page · raw message

131 lines not on this page · raw message

index f9b1fab4388a..21597dcac0e2 100644
@@ -59,25 +59,7 @@ struct notifier_block;
  * CPU notifier priorities.
  */
 enum {
-	/*
-	 * SCHED_ACTIVE marks a cpu which is coming up active during
-	 * CPU_ONLINE and CPU_DOWN_FAILED and must be the first
-	 * notifier.  CPUSET_ACTIVE adjusts cpuset according to
-	 * cpu_active mask right after SCHED_ACTIVE.  During
-	 * CPU_DOWN_PREPARE, SCHED_INACTIVE and CPUSET_INACTIVE are
-	 * ordered in the similar way.
-	 *
-	 * This ordering guarantees consistent cpu_active mask and
-	 * migration behavior to all cpu notifiers.
-	 */
-	CPU_PRI_SCHED_ACTIVE	= INT_MAX,
-	CPU_PRI_CPUSET_ACTIVE	= INT_MAX - 1,
-	CPU_PRI_SCHED_INACTIVE	= INT_MIN + 1,
-	CPU_PRI_CPUSET_INACTIVE	= INT_MIN,
-
-	/* migration should happen before other stuff but after perf */
 	CPU_PRI_PERF		= 20,
-	CPU_PRI_MIGRATION	= 10,
 
 	/* bring up workqueues before normal notifiers and down after */
 	CPU_PRI_WORKQUEUE_UP	= 5,

index 5d68e15e46b7..386374d19987 100644
@@ -8,6 +8,7 @@ enum cpuhp_state {
 	CPUHP_BRINGUP_CPU,
 	CPUHP_AP_IDLE_DEAD,
 	CPUHP_AP_OFFLINE,
+	CPUHP_AP_SCHED_STARTING,
 	CPUHP_AP_NOTIFY_STARTING,
 	CPUHP_AP_ONLINE,
 	CPUHP_TEARDOWN_CPU,

@@ -16,6 +17,7 @@ enum cpuhp_state {
 	CPUHP_AP_NOTIFY_ONLINE,
 	CPUHP_AP_ONLINE_DYN,
 	CPUHP_AP_ONLINE_DYN_END		= CPUHP_AP_ONLINE_DYN + 30,
+	CPUHP_AP_ACTIVE,
 	CPUHP_ONLINE,
 };
 

index 40cee6b77a93..e828cf65d7df 100644
@@ -743,12 +743,10 @@ set_cpu_present(unsigned int cpu, bool present)
 static inline void
 set_cpu_online(unsigned int cpu, bool online)
 {
-	if (online) {
+	if (online)
 		cpumask_set_cpu(cpu, &__cpu_online_mask);
-		cpumask_set_cpu(cpu, &__cpu_active_mask);
-	} else {
+	else
 		cpumask_clear_cpu(cpu, &__cpu_online_mask);
-	}
 }
 
 static inline void

index d10ef06971b5..fb7d87e45fbe 100644
@@ -356,8 +356,13 @@ extern void lockdep_set_current_reclaim_state(gfp_t gfp_mask);
 extern void lockdep_clear_current_reclaim_state(void);
 extern void lockdep_trace_alloc(gfp_t mask);
 
-extern void lock_pin_lock(struct lockdep_map *lock);
-extern void lock_unpin_lock(struct lockdep_map *lock);
+struct pin_cookie { unsigned int val; };
+
+#define NIL_COOKIE (struct pin_cookie){ .val = 0U, }
+
+extern struct pin_cookie lock_pin_lock(struct lockdep_map *lock);
+extern void lock_repin_lock(struct lockdep_map *lock, struct pin_cookie);
+extern void lock_unpin_lock(struct lockdep_map *lock, struct pin_cookie);
 
 # define INIT_LOCKDEP				.lockdep_recursion = 0, .lockdep_reclaim_gfp = 0,
 

@@ -373,8 +378,9 @@ extern void lock_unpin_lock(struct lockdep_map *lock);
 
 #define lockdep_recursing(tsk)	((tsk)->lockdep_recursion)
 
-#define lockdep_pin_lock(l)		lock_pin_lock(&(l)->dep_map)
-#define lockdep_unpin_lock(l)	lock_unpin_lock(&(l)->dep_map)
+#define lockdep_pin_lock(l)	lock_pin_lock(&(l)->dep_map)
+#define lockdep_repin_lock(l,c)	lock_repin_lock(&(l)->dep_map, (c))
+#define lockdep_unpin_lock(l,c)	lock_unpin_lock(&(l)->dep_map, (c))
 
 #else /* !CONFIG_LOCKDEP */
 

@@ -427,8 +433,13 @@ struct lock_class_key { };
 
 #define lockdep_recursing(tsk)			(0)
 
-#define lockdep_pin_lock(l)				do { (void)(l); } while (0)
-#define lockdep_unpin_lock(l)			do { (void)(l); } while (0)
+struct pin_cookie { };
+
+#define NIL_COOKIE (struct pin_cookie){ }
+
+#define lockdep_pin_lock(l)			({ struct pin_cookie cookie; cookie; })
+#define lockdep_repin_lock(l, c)		do { (void)(l); (void)(c); } while (0)
+#define lockdep_unpin_lock(l, c)		do { (void)(l); (void)(c); } while (0)
 
 #endif /* !LOCKDEP */
 

index 70fffeba7495..a4441784503b 100644
@@ -1,9 +1,16 @@
 #ifndef _LINUX_MMU_CONTEXT_H
 #define _LINUX_MMU_CONTEXT_H
 
+#include <asm/mmu_context.h>
+
 struct mm_struct;
 
 void use_mm(struct mm_struct *mm);
 void unuse_mm(struct mm_struct *mm);
 
+/* Architectures that care about IRQ state in switch_mm can override this. */
+#ifndef switch_mm_irqs_off
+# define switch_mm_irqs_off switch_mm
+#endif
+
 #endif

176 lines not on this page · raw message

index 3e3f6e49eabb..d948e44c471e 100644
@@ -703,21 +703,6 @@ static int takedown_cpu(unsigned int cpu)
 	struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
 	int err;
 
-	/*
-	 * By now we've cleared cpu_active_mask, wait for all preempt-disabled
-	 * and RCU users of this state to go away such that all new such users
-	 * will observe it.
-	 *
-	 * For CONFIG_PREEMPT we have preemptible RCU and its sync_rcu() might
-	 * not imply sync_sched(), so wait for both.
-	 *
-	 * Do sync before park smpboot threads to take care the rcu boost case.
-	 */
-	if (IS_ENABLED(CONFIG_PREEMPT))
-		synchronize_rcu_mult(call_rcu, call_rcu_sched);
-	else
-		synchronize_rcu();
-
 	/* Park the smpboot threads */
 	kthread_park(per_cpu_ptr(&cpuhp_state, cpu)->thread);
 	smpboot_park_threads(cpu);

@@ -923,8 +908,6 @@ void cpuhp_online_idle(enum cpuhp_state state)
 
 	st->state = CPUHP_AP_ONLINE_IDLE;
 
-	/* The cpu is marked online, set it active now */
-	set_cpu_active(cpu, true);
 	/* Unpark the stopper thread and the hotplug thread of this cpu */
 	stop_machine_unpark(cpu);
 	kthread_unpark(st->thread);

@@ -1236,6 +1219,12 @@ static struct cpuhp_step cpuhp_ap_states[] = {
 		.name			= "ap:offline",
 		.cant_stop		= true,
 	},
+	/* First state is scheduler control. Interrupts are disabled */
+	[CPUHP_AP_SCHED_STARTING] = {
+		.name			= "sched:starting",
+		.startup		= sched_cpu_starting,
+		.teardown		= sched_cpu_dying,
+	},
 	/*
 	 * Low level startup/teardown notifiers. Run with interrupts
 	 * disabled. Will be removed once the notifiers are converted to

@@ -1274,6 +1263,15 @@ static struct cpuhp_step cpuhp_ap_states[] = {
 	 * The dynamically registered state space is here
 	 */
 
+#ifdef CONFIG_SMP
+	/* Last state is scheduler control setting the cpu active */
+	[CPUHP_AP_ACTIVE] = {
+		.name			= "sched:active",
+		.startup		= sched_cpu_activate,
+		.teardown		= sched_cpu_deactivate,
+	},
+#endif
+
 	/* CPU is fully up and running. */
 	[CPUHP_ONLINE] = {
 		.name			= "online",

127 lines not on this page · raw message

68 lines not on this page · raw message

1,448 lines not on this page · raw message

264 lines not on this page · raw message

index 5a75b08cfd85..5be58820465c 100644
@@ -103,10 +103,10 @@ int cpudl_find(struct cpudl *cp, struct task_struct *p,
 	const struct sched_dl_entity *dl_se = &p->dl;
 
 	if (later_mask &&
-	    cpumask_and(later_mask, cp->free_cpus, &p->cpus_allowed)) {
+	    cpumask_and(later_mask, cp->free_cpus, tsk_cpus_allowed(p))) {
 		best_cpu = cpumask_any(later_mask);
 		goto out;
-	} else if (cpumask_test_cpu(cpudl_maximum(cp), &p->cpus_allowed) &&
+	} else if (cpumask_test_cpu(cpudl_maximum(cp), tsk_cpus_allowed(p)) &&
 			dl_time_before(dl_se->deadline, cp->elements[0].dl)) {
 		best_cpu = cpudl_maximum(cp);
 		if (later_mask)

index 981fcd7dc394..11e9705bf937 100644
@@ -103,11 +103,11 @@ int cpupri_find(struct cpupri *cp, struct task_struct *p,
 		if (skip)
 			continue;
 
-		if (cpumask_any_and(&p->cpus_allowed, vec->mask) >= nr_cpu_ids)
+		if (cpumask_any_and(tsk_cpus_allowed(p), vec->mask) >= nr_cpu_ids)
 			continue;
 
 		if (lowest_mask) {
-			cpumask_and(lowest_mask, &p->cpus_allowed, vec->mask);
+			cpumask_and(lowest_mask, tsk_cpus_allowed(p), vec->mask);
 
 			/*
 			 * We have to ensure that we have at least one bit

179 lines not on this page · raw message

index 4fbc3bd5ff60..cf905f655ba1 100644
@@ -626,15 +626,16 @@ do {									\
 #undef P
 #undef PN
 
-#ifdef CONFIG_SCHEDSTATS
-#define P(n) SEQ_printf(m, "  .%-30s: %d\n", #n, rq->n);
-#define P64(n) SEQ_printf(m, "  .%-30s: %Ld\n", #n, rq->n);
-
 #ifdef CONFIG_SMP
+#define P64(n) SEQ_printf(m, "  .%-30s: %Ld\n", #n, rq->n);
 	P64(avg_idle);
 	P64(max_idle_balance_cost);
+#undef P64
 #endif
 
+#ifdef CONFIG_SCHEDSTATS
+#define P(n) SEQ_printf(m, "  .%-30s: %d\n", #n, rq->n);
+
 	if (schedstat_enabled()) {
 		P(yld_count);
 		P(sched_count);

@@ -644,7 +645,6 @@ do {									\
 	}
 
 #undef P
-#undef P64
 #endif
 	spin_lock_irqsave(&sched_debug_lock, flags);
 	print_cfs_stats(m, cpu);

204 lines not on this page · raw message

index 47ce94931f1b..2ce5458bbe1d 100644

Lines of this file are not shown. View the raw message.

index ef7159012cf3..b0b93fd33af9 100644

Lines of this file are not shown. View the raw message.

index ec4f538d4396..d5690b722691 100644

Lines of this file are not shown. View the raw message.

140 lines not on this page · raw message

index cbc67da10954..604297a08b3a 100644

Lines of this file are not shown. View the raw message.

index 58e3310c9b21..31872bc53bc4 100644

Lines of this file are not shown. View the raw message.

index f802c2d216a7..6f4d27c5bb32 100644

Lines of this file are not shown. View the raw message.