linux-kernel - [PATCH 14/40] workqueue: temporarily disable workqueue tracing

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Message-Id: <1263776272-382-15-git-send-email-tj@kernel.org>
Date:	Mon, 18 Jan 2010 09:57:26 +0900
From:	Tejun Heo <tj@...nel.org>
To:	torvalds@...ux-foundation.org, mingo@...e.hu, peterz@...radead.org,
	awalls@...ix.net, linux-kernel@...r.kernel.org, jeff@...zik.org,
	akpm@...ux-foundation.org, jens.axboe@...cle.com,
	rusty@...tcorp.com.au, cl@...ux-foundation.org,
	dhowells@...hat.com, arjan@...ux.intel.com, avi@...hat.com,
	johannes@...solutions.net, andi@...stfloor.org
Cc:	Tejun Heo <tj@...nel.org>
Subject: [PATCH 14/40] workqueue: temporarily disable workqueue tracing

Strip tracing code from workqueue and disable workqueue tracing.  This
is temporary measure till concurrency managed workqueue is complete.

Signed-off-by: Tejun Heo <tj@...nel.org>
---
 kernel/trace/Kconfig |    4 +++-
 kernel/workqueue.c   |   14 +++-----------
 2 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 6c22d8a..833d244 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -414,7 +414,9 @@ config KMEMTRACE
 	  If unsure, say N.
 
 config WORKQUEUE_TRACER
-	bool "Trace workqueues"
+# Temporarily disabled during workqueue reimplementation
+#	bool "Trace workqueues"
+	def_bool n
 	select GENERIC_TRACER
 	help
 	  The workqueue tracer provides some statistical information
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index aa1d680..a48a9b8 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -33,8 +33,6 @@
 #include <linux/kallsyms.h>
 #include <linux/debug_locks.h>
 #include <linux/lockdep.h>
-#define CREATE_TRACE_POINTS
-#include <trace/events/workqueue.h>
 
 /*
  * Structure fields follow one of the following exclusion rules.
@@ -236,10 +234,10 @@ static inline void set_wq_data(struct work_struct *work,
 			WORK_STRUCT_PENDING | extra_flags);
 }
 
-static inline
-struct cpu_workqueue_struct *get_wq_data(struct work_struct *work)
+static inline struct cpu_workqueue_struct *get_wq_data(struct work_struct *work)
 {
-	return (void *) (atomic_long_read(&work->data) & WORK_STRUCT_WQ_DATA_MASK);
+	return (void *)(atomic_long_read(&work->data) &
+			WORK_STRUCT_WQ_DATA_MASK);
 }
 
 /**
@@ -258,8 +256,6 @@ static void insert_work(struct cpu_workqueue_struct *cwq,
 			struct work_struct *work, struct list_head *head,
 			unsigned int extra_flags)
 {
-	trace_workqueue_insertion(cwq->thread, work);
-
 	/* we own @work, set data and link */
 	set_wq_data(work, cwq, extra_flags);
 
@@ -424,7 +420,6 @@ static void process_one_work(struct cpu_workqueue_struct *cwq,
 	struct lockdep_map lockdep_map = work->lockdep_map;
 #endif
 	/* claim and process */
-	trace_workqueue_execution(cwq->thread, work);
 	debug_work_deactivate(work);
 	cwq->current_work = work;
 	list_del_init(&work->entry);
@@ -985,8 +980,6 @@ static int create_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
 		return PTR_ERR(p);
 	cwq->thread = p;
 
-	trace_workqueue_creation(cwq->thread, cpu);
-
 	return 0;
 }
 
@@ -1091,7 +1084,6 @@ static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
 	 * checks list_empty(), and a "normal" queue_work() can't use
 	 * a dead CPU.
 	 */
-	trace_workqueue_destruction(cwq->thread);
 	kthread_stop(cwq->thread);
 	cwq->thread = NULL;
 }
-- 
1.6.4.2

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