---

yaml
---
r: 40296
b: refs/heads/master
c: 70a0a53
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d1752aa884ec0ac3027c1a3d456bf69bf765c8b8
+refs/heads/master: 70a0a5357db20c291d46c04011d646d5d84c868c

trunk/arch/x86_64/kernel/io_apic.c

@@ -63,7 +63,7 @@ int timer_over_8254 __initdata = 1;
 static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
 
 static DEFINE_SPINLOCK(ioapic_lock);
-static DEFINE_SPINLOCK(vector_lock);
+DEFINE_SPINLOCK(vector_lock);
 
 /*
  * # of IRQ routing registers
@@ -618,6 +618,9 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
 
 	BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
 
+	/* Only try and allocate irqs on cpus that are present */
+	cpus_and(mask, mask, cpu_online_map);
+
 	if (irq_vector[irq] > 0)
 		old_vector = irq_vector[irq];
 	if (old_vector > 0) {
@@ -627,11 +630,12 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
 	}
 
 	for_each_cpu_mask(cpu, mask) {
-		cpumask_t domain;
+		cpumask_t domain, new_mask;
 		int new_cpu;
 		int vector, offset;
 
 		domain = vector_allocation_domain(cpu);
+		cpus_and(new_mask, domain, cpu_online_map);
 
 		vector = current_vector;
 		offset = current_offset;
@@ -646,18 +650,20 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
 			continue;
 		if (vector == IA32_SYSCALL_VECTOR)
 			goto next;
-		for_each_cpu_mask(new_cpu, domain)
+		for_each_cpu_mask(new_cpu, new_mask)
 			if (per_cpu(vector_irq, new_cpu)[vector] != -1)
 				goto next;
 		/* Found one! */
 		current_vector = vector;
 		current_offset = offset;
 		if (old_vector >= 0) {
+			cpumask_t old_mask;
 			int old_cpu;
-			for_each_cpu_mask(old_cpu, irq_domain[irq])
+			cpus_and(old_mask, irq_domain[irq], cpu_online_map);
+			for_each_cpu_mask(old_cpu, old_mask)
 				per_cpu(vector_irq, old_cpu)[old_vector] = -1;
 		}
-		for_each_cpu_mask(new_cpu, domain)
+		for_each_cpu_mask(new_cpu, new_mask)
 			per_cpu(vector_irq, new_cpu)[vector] = irq;
 		irq_vector[irq] = vector;
 		irq_domain[irq] = domain;
@@ -678,6 +684,32 @@ static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
 	return vector;
 }
 
+void __setup_vector_irq(int cpu)
+{
+	/* Initialize vector_irq on a new cpu */
+	/* This function must be called with vector_lock held */
+	unsigned long flags;
+	int irq, vector;
+
+
+	/* Mark the inuse vectors */
+	for (irq = 0; irq < NR_IRQ_VECTORS; ++irq) {
+		if (!cpu_isset(cpu, irq_domain[irq]))
+			continue;
+		vector = irq_vector[irq];
+		per_cpu(vector_irq, cpu)[vector] = irq;
+	}
+	/* Mark the free vectors */
+	for (vector = 0; vector < NR_VECTORS; ++vector) {
+		irq = per_cpu(vector_irq, cpu)[vector];
+		if (irq < 0)
+			continue;
+		if (!cpu_isset(cpu, irq_domain[irq]))
+			per_cpu(vector_irq, cpu)[vector] = -1;
+	}
+}
+
+
 extern void (*interrupt[NR_IRQS])(void);
 
 static struct irq_chip ioapic_chip;

trunk/arch/x86_64/kernel/smpboot.c

@@ -581,12 +581,16 @@ void __cpuinit start_secondary(void)
 	 * smp_call_function().
 	 */
 	lock_ipi_call_lock();
+	spin_lock(&vector_lock);
 
+	/* Setup the per cpu irq handling data structures */
+	__setup_vector_irq(smp_processor_id());
 	/*
 	 * Allow the master to continue.
 	 */
 	cpu_set(smp_processor_id(), cpu_online_map);
 	per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
+	spin_unlock(&vector_lock);
 	unlock_ipi_call_lock();
 
 	cpu_idle();
@@ -799,7 +803,6 @@ static int __cpuinit do_boot_cpu(int cpu, int apicid)
 				cpu, node);
 	}
 
-
 	alternatives_smp_switch(1);
 
 	c_idle.idle = get_idle_for_cpu(cpu);
@@ -1246,8 +1249,10 @@ int __cpu_disable(void)
 	local_irq_disable();
 	remove_siblinginfo(cpu);
 
+	spin_lock(&vector_lock);
 	/* It's now safe to remove this processor from the online map */
 	cpu_clear(cpu, cpu_online_map);
+	spin_unlock(&vector_lock);
 	remove_cpu_from_maps();
 	fixup_irqs(cpu_online_map);
 	return 0;

trunk/include/asm-x86_64/hw_irq.h

@@ -76,6 +76,8 @@
 #ifndef __ASSEMBLY__
 typedef int vector_irq_t[NR_VECTORS];
 DECLARE_PER_CPU(vector_irq_t, vector_irq);
+extern void __setup_vector_irq(int cpu);
+extern spinlock_t vector_lock;
 
 /*
  * Various low-level irq details needed by irq.c, process.c,