linux-kernel - [PATCH] irq/tracing: Add IRQ name to irq_handler

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Message-ID: <20250130181439.58130-1-wander@redhat.com>
Date: Thu, 30 Jan 2025 15:14:38 -0300
From: Wander Lairson Costa <wander@...hat.com>
To: Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	"Darrick J. Wong" <djwong@...nel.org>,
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Takashi Iwai <tiwai@...e.de>,
	Wander Lairson Costa <wander@...hat.com>,
	linux-kernel@...r.kernel.org (open list:TRACING),
	linux-trace-kernel@...r.kernel.org (open list:TRACING)
Subject: [PATCH] irq/tracing: Add IRQ name to irq_handler_exit tracepoint

The irq_handler_entry tracepoint includes a "name" field, which allows
for easy identification and filtering of specific IRQs. However, the
irq_handler_exit tracepoint lacks this field, making it difficult to
pair corresponding entry and exit events for analysis.

Add the "name" field to irq_handler_exit to enable consistent tracking
and correlation of IRQ entry and exit events.

Signed-off-by: Wander Lairson Costa <wander@...hat.com>
---
 include/trace/events/irq.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/trace/events/irq.h b/include/trace/events/irq.h
index 837c1740d0d0..d705406daa37 100644
--- a/include/trace/events/irq.h
+++ b/include/trace/events/irq.h
@@ -88,16 +88,18 @@ TRACE_EVENT(irq_handler_exit,
 
 	TP_STRUCT__entry(
 		__field(	int,	irq	)
+		__string(	name,	action->name	)
 		__field(	int,	ret	)
 	),
 
 	TP_fast_assign(
 		__entry->irq	= irq;
+		__assign_str(name);
 		__entry->ret	= ret;
 	),
 
-	TP_printk("irq=%d ret=%s",
-		  __entry->irq, __entry->ret ? "handled" : "unhandled")
+	TP_printk("irq=%d name=%s ret=%s",
+		  __entry->irq, __get_str(name), __entry->ret ? "handled" : "unhandled")
 );
 
 DECLARE_EVENT_CLASS(softirq,
-- 
2.48.1