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ftrace: fix wakeups

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Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-05-12 21:20:52 +02:00
committed by Thomas Gleixner
parent 24cd5d111e
commit 017730c112
3 changed files with 31 additions and 4 deletions
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15
kernel/trace/trace.c
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@@ -70,12 +70,13 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
unsigned long trace_flags = TRACE_ITER_PRINT_PARENT;
/*
* FIXME: where should this be called?
*/
void trace_wake_up(void)
{
if (!(trace_flags & TRACE_ITER_BLOCK))
/*
* The runqueue_is_locked() can fail, but this is the best we
* have for now:
*/
if (!(trace_flags & TRACE_ITER_BLOCK) && !runqueue_is_locked())
wake_up(&trace_wait);
}
@@ -657,6 +658,8 @@ trace_function(struct trace_array *tr, struct trace_array_cpu *data,
entry->fn.ip = ip;
entry->fn.parent_ip = parent_ip;
spin_unlock_irqrestore(&data->lock, irq_flags);
trace_wake_up();
}
void
@@ -686,6 +689,8 @@ __trace_special(void *__tr, void *__data,
entry->special.arg2 = arg2;
entry->special.arg3 = arg3;
spin_unlock_irqrestore(&data->lock, irq_flags);
trace_wake_up();
}
#endif
@@ -759,6 +764,8 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
entry->ctx.next_prio = wakee->prio;
__trace_stack(tr, data, flags, 5);
spin_unlock_irqrestore(&data->lock, irq_flags);
trace_wake_up();
}
#ifdef CONFIG_FTRACE