The patch titled
trace,x86: add tracepoint to x86 timer interrupt handler
has been added to the -mm tree. Its filename is
tracex86-add-tracepoint-to-x86-timer-interrupt-handler.patch
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Subject: trace,x86: add tracepoint to x86 timer interrupt handler
From: Vaibhav Nagarnaik <vnagarnaik@xxxxxxxxxx>
The x86 timer interrupt handler is the only handler not traced in the
irq/irq_handler_{entry|exit} trace events.
Add tracepoints to the interrupt handler to trace it.
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Michael Rubin <mrubin@xxxxxxxxxx>
Cc: David Sharp <dhsharp@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/time.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff -puN arch/x86/kernel/time.c~tracex86-add-tracepoint-to-x86-timer-interrupt-handler arch/x86/kernel/time.c
--- a/arch/x86/kernel/time.c~tracex86-add-tracepoint-to-x86-timer-interrupt-handler
+++ a/arch/x86/kernel/time.c
@@ -52,6 +52,13 @@ unsigned long profile_pc(struct pt_regs
}
EXPORT_SYMBOL(profile_pc);
+static irqreturn_t timer_interrupt(int irq, void *dev_id);
+static struct irqaction irq0 = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
+ .name = "timer"
+};
+
/*
* Default timer interrupt handler for PIT/HPET
*/
@@ -60,7 +67,9 @@ static irqreturn_t timer_interrupt(int i
/* Keep nmi watchdog up to date */
inc_irq_stat(irq0_irqs);
+ trace_irq_handler_entry(irq, &irq0);
global_clock_event->event_handler(global_clock_event);
+ trace_irq_handler_exit(irq, &irq0, 1);
/* MCA bus quirk: Acknowledge irq0 by setting bit 7 in port 0x61 */
if (MCA_bus)
@@ -69,12 +78,6 @@ static irqreturn_t timer_interrupt(int i
return IRQ_HANDLED;
}
-static struct irqaction irq0 = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
- .name = "timer"
-};
-
void __init setup_default_timer_irq(void)
{
setup_irq(0, &irq0);
_
Patches currently in -mm which might be from vnagarnaik@xxxxxxxxxx are
origin.patch
tracex86-add-tracepoint-to-x86-timer-interrupt-handler.patch
tracex86-add-x86-irq-vector-entry-exit-tracepoints.patch
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