diff options
author | Ingo Molnar <mingo@elte.hu> | 2011-02-23 11:20:24 +0100 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2011-02-23 11:20:24 +0100 |
commit | d1c6cdae7a2c40a6b0e8f3f0a1899cab0b53c6f1 (patch) | |
tree | d7442d41a105f5fea2116085190433f7afd0b567 /kernel | |
parent | c60608f437db66ff2e14ffa543902b236d81f5e6 (diff) | |
parent | 4a508dd259f5995b8d31c576b894263f5947d654 (diff) |
Merge branch 'linus' into auto-latest
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/irq/internals.h | 6 | ||||
-rw-r--r-- | kernel/irq/irqdesc.c | 11 | ||||
-rw-r--r-- | kernel/irq/manage.c | 2 | ||||
-rw-r--r-- | kernel/irq/resend.c | 2 | ||||
-rw-r--r-- | kernel/perf_event.c | 19 |
5 files changed, 33 insertions, 7 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index 4571ae7e085a..99c3bc8a6fb4 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -3,6 +3,12 @@ */ #include <linux/irqdesc.h> +#ifdef CONFIG_SPARSE_IRQ +# define IRQ_BITMAP_BITS (NR_IRQS + 8196) +#else +# define IRQ_BITMAP_BITS NR_IRQS +#endif + extern int noirqdebug; #define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data) diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index a7ac6e1e7074..a250d3a0af12 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -94,7 +94,7 @@ int nr_irqs = NR_IRQS; EXPORT_SYMBOL_GPL(nr_irqs); static DEFINE_MUTEX(sparse_irq_lock); -static DECLARE_BITMAP(allocated_irqs, NR_IRQS); +static DECLARE_BITMAP(allocated_irqs, IRQ_BITMAP_BITS); #ifdef CONFIG_SPARSE_IRQ @@ -217,6 +217,15 @@ int __init early_irq_init(void) initcnt = arch_probe_nr_irqs(); printk(KERN_INFO "NR_IRQS:%d nr_irqs:%d %d\n", NR_IRQS, nr_irqs, initcnt); + if (WARN_ON(nr_irqs > IRQ_BITMAP_BITS)) + nr_irqs = IRQ_BITMAP_BITS; + + if (WARN_ON(initcnt > IRQ_BITMAP_BITS)) + initcnt = IRQ_BITMAP_BITS; + + if (initcnt > nr_irqs) + nr_irqs = initcnt; + for (i = 0; i < initcnt; i++) { desc = alloc_desc(i, node); set_bit(i, allocated_irqs); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 47b2bf10afbc..ba84307fbf24 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1196,7 +1196,7 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler, if (retval) kfree(action); -#ifdef CONFIG_DEBUG_SHIRQ +#ifdef CONFIG_DEBUG_SHIRQ_FIXME if (!retval && (irqflags & IRQF_SHARED)) { /* * It's a shared IRQ -- the driver ought to be prepared for it diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c index 891115a929aa..dc49358b73fa 100644 --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -23,7 +23,7 @@ #ifdef CONFIG_HARDIRQS_SW_RESEND /* Bitmap to handle software resend of interrupts: */ -static DECLARE_BITMAP(irqs_resend, NR_IRQS); +static DECLARE_BITMAP(irqs_resend, IRQ_BITMAP_BITS); /* * Run software resends of IRQ's diff --git a/kernel/perf_event.c b/kernel/perf_event.c index a353a4d6d00d..3d3f282fa50e 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -851,6 +851,10 @@ retry: raw_spin_unlock_irq(&ctx->lock); } +#define MAX_INTERRUPTS (~0ULL) + +static void perf_log_throttle(struct perf_event *event, int enable); + static int event_sched_in(struct perf_event *event, struct perf_cpu_context *cpuctx, @@ -863,6 +867,17 @@ event_sched_in(struct perf_event *event, event->state = PERF_EVENT_STATE_ACTIVE; event->oncpu = smp_processor_id(); + + /* + * Unthrottle events, since we scheduled we might have missed several + * ticks already, also for a heavily scheduling task there is little + * guarantee it'll get a tick in a timely manner. + */ + if (unlikely(event->hw.interrupts == MAX_INTERRUPTS)) { + perf_log_throttle(event, 1); + event->hw.interrupts = 0; + } + /* * The new state must be visible before we turn it on in the hardware: */ @@ -1661,10 +1676,6 @@ void __perf_event_task_sched_in(struct task_struct *task) } } -#define MAX_INTERRUPTS (~0ULL) - -static void perf_log_throttle(struct perf_event *event, int enable); - static u64 perf_calculate_period(struct perf_event *event, u64 nsec, u64 count) { u64 frequency = event->attr.sample_freq; |