1 files changed, 169 insertions, 14 deletions

diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index b99caa8b780..cee02d65ab3 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -4,8 +4,8 @@
 #if !defined(_TRACE_WRITEBACK_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_WRITEBACK_H
 
+#include <linux/tracepoint.h>
 #include <linux/backing-dev.h>
-#include <linux/device.h>
 #include <linux/writeback.h>
 
 #define show_inode_state(state)					\
@@ -21,8 +21,127 @@
 		{I_REFERENCED,		"I_REFERENCED"}		\
 	)
 
+#define WB_WORK_REASON							\
+		{WB_REASON_BACKGROUND,		"background"},		\
+		{WB_REASON_TRY_TO_FREE_PAGES,	"try_to_free_pages"},	\
+		{WB_REASON_SYNC,		"sync"},		\
+		{WB_REASON_PERIODIC,		"periodic"},		\
+		{WB_REASON_LAPTOP_TIMER,	"laptop_timer"},	\
+		{WB_REASON_FREE_MORE_MEM,	"free_more_memory"},	\
+		{WB_REASON_FS_FREE_SPACE,	"fs_free_space"},	\
+		{WB_REASON_FORKER_THREAD,	"forker_thread"}
+
 struct wb_writeback_work;
 
+TRACE_EVENT(writeback_dirty_page,
+
+	TP_PROTO(struct page *page, struct address_space *mapping),
+
+	TP_ARGS(page, mapping),
+
+	TP_STRUCT__entry (
+		__array(char, name, 32)
+		__field(unsigned long, ino)
+		__field(pgoff_t, index)
+	),
+
+	TP_fast_assign(
+		strncpy(__entry->name,
+			mapping ? dev_name(mapping->backing_dev_info->dev) : "(unknown)", 32);
+		__entry->ino = mapping ? mapping->host->i_ino : 0;
+		__entry->index = page->index;
+	),
+
+	TP_printk("bdi %s: ino=%lu index=%lu",
+		__entry->name,
+		__entry->ino,
+		__entry->index
+	)
+);
+
+DECLARE_EVENT_CLASS(writeback_dirty_inode_template,
+
+	TP_PROTO(struct inode *inode, int flags),
+
+	TP_ARGS(inode, flags),
+
+	TP_STRUCT__entry (
+		__array(char, name, 32)
+		__field(unsigned long, ino)
+		__field(unsigned long, flags)
+	),
+
+	TP_fast_assign(
+		struct backing_dev_info *bdi = inode->i_mapping->backing_dev_info;
+
+		/* may be called for files on pseudo FSes w/ unregistered bdi */
+		strncpy(__entry->name,
+			bdi->dev ? dev_name(bdi->dev) : "(unknown)", 32);
+		__entry->ino		= inode->i_ino;
+		__entry->flags		= flags;
+	),
+
+	TP_printk("bdi %s: ino=%lu flags=%s",
+		__entry->name,
+		__entry->ino,
+		show_inode_state(__entry->flags)
+	)
+);
+
+DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode_start,
+
+	TP_PROTO(struct inode *inode, int flags),
+
+	TP_ARGS(inode, flags)
+);
+
+DEFINE_EVENT(writeback_dirty_inode_template, writeback_dirty_inode,
+
+	TP_PROTO(struct inode *inode, int flags),
+
+	TP_ARGS(inode, flags)
+);
+
+DECLARE_EVENT_CLASS(writeback_write_inode_template,
+
+	TP_PROTO(struct inode *inode, struct writeback_control *wbc),
+
+	TP_ARGS(inode, wbc),
+
+	TP_STRUCT__entry (
+		__array(char, name, 32)
+		__field(unsigned long, ino)
+		__field(int, sync_mode)
+	),
+
+	TP_fast_assign(
+		strncpy(__entry->name,
+			dev_name(inode->i_mapping->backing_dev_info->dev), 32);
+		__entry->ino		= inode->i_ino;
+		__entry->sync_mode	= wbc->sync_mode;
+	),
+
+	TP_printk("bdi %s: ino=%lu sync_mode=%d",
+		__entry->name,
+		__entry->ino,
+		__entry->sync_mode
+	)
+);
+
+DEFINE_EVENT(writeback_write_inode_template, writeback_write_inode_start,
+
+	TP_PROTO(struct inode *inode, struct writeback_control *wbc),
+
+	TP_ARGS(inode, wbc)
+);
+
+DEFINE_EVENT(writeback_write_inode_template, writeback_write_inode,
+
+	TP_PROTO(struct inode *inode, struct writeback_control *wbc),
+
+	TP_ARGS(inode, wbc)
+);
+
 DECLARE_EVENT_CLASS(writeback_work_class,
 	TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work),
 	TP_ARGS(bdi, work),
@@ -37,7 +156,10 @@ DECLARE_EVENT_CLASS(writeback_work_class,
 		__field(int, reason)
 	),
 	TP_fast_assign(
-		strncpy(__entry->name, dev_name(bdi->dev), 32);
+		struct device *dev = bdi->dev;
+		if (!dev)
+			dev = default_backing_dev_info.dev;
+		strncpy(__entry->name, dev_name(dev), 32);
 		__entry->nr_pages = work->nr_pages;
 		__entry->sb_dev = work->sb ? work->sb->s_dev : 0;
 		__entry->sync_mode = work->sync_mode;
@@ -55,14 +177,13 @@ DECLARE_EVENT_CLASS(writeback_work_class,
 		  __entry->for_kupdate,
 		  __entry->range_cyclic,
 		  __entry->for_background,
-		  wb_reason_name[__entry->reason]
+		  __print_symbolic(__entry->reason, WB_WORK_REASON)
 	)
 );
 #define DEFINE_WRITEBACK_WORK_EVENT(name) \
 DEFINE_EVENT(writeback_work_class, name, \
 	TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \
 	TP_ARGS(bdi, work))
-DEFINE_WRITEBACK_WORK_EVENT(writeback_nothread);
 DEFINE_WRITEBACK_WORK_EVENT(writeback_queue);
 DEFINE_WRITEBACK_WORK_EVENT(writeback_exec);
 DEFINE_WRITEBACK_WORK_EVENT(writeback_start);
@@ -101,12 +222,8 @@ DEFINE_EVENT(writeback_class, name, \
 
 DEFINE_WRITEBACK_EVENT(writeback_nowork);
 DEFINE_WRITEBACK_EVENT(writeback_wake_background);
-DEFINE_WRITEBACK_EVENT(writeback_wake_thread);
-DEFINE_WRITEBACK_EVENT(writeback_wake_forker_thread);
 DEFINE_WRITEBACK_EVENT(writeback_bdi_register);
 DEFINE_WRITEBACK_EVENT(writeback_bdi_unregister);
-DEFINE_WRITEBACK_EVENT(writeback_thread_start);
-DEFINE_WRITEBACK_EVENT(writeback_thread_stop);
 
 DECLARE_EVENT_CLASS(wbc_class,
 	TP_PROTO(struct writeback_control *wbc, struct backing_dev_info *bdi),
@@ -184,7 +301,8 @@ TRACE_EVENT(writeback_queue_io,
 		__entry->older,	/* older_than_this in jiffies */
 		__entry->age,	/* older_than_this in relative milliseconds */
 		__entry->moved,
-		wb_reason_name[__entry->reason])
+		__print_symbolic(__entry->reason, WB_WORK_REASON)
+	)
 );
 
 TRACE_EVENT(global_dirty_state,
@@ -289,12 +407,13 @@ TRACE_EVENT(balance_dirty_pages,
 		 unsigned long dirty_ratelimit,
 		 unsigned long task_ratelimit,
 		 unsigned long dirtied,
+		 unsigned long period,
 		 long pause,
 		 unsigned long start_time),
 
 	TP_ARGS(bdi, thresh, bg_thresh, dirty, bdi_thresh, bdi_dirty,
 		dirty_ratelimit, task_ratelimit,
-		dirtied, pause, start_time),
+		dirtied, period, pause, start_time),
 
 	TP_STRUCT__entry(
 		__array(	 char,	bdi, 32)
@@ -309,6 +428,8 @@ TRACE_EVENT(balance_dirty_pages,
 		__field(unsigned int,	dirtied_pause)
 		__field(unsigned long,	paused)
 		__field(	 long,	pause)
+		__field(unsigned long,	period)
+		__field(	 long,	think)
 	),
 
 	TP_fast_assign(
@@ -325,6 +446,9 @@ TRACE_EVENT(balance_dirty_pages,
 		__entry->task_ratelimit	= KBps(task_ratelimit);
 		__entry->dirtied	= dirtied;
 		__entry->dirtied_pause	= current->nr_dirtied_pause;
+		__entry->think		= current->dirty_paused_when == 0 ? 0 :
+			 (long)(jiffies - current->dirty_paused_when) * 1000/HZ;
+		__entry->period		= period * 1000 / HZ;
 		__entry->pause		= pause * 1000 / HZ;
 		__entry->paused		= (jiffies - start_time) * 1000 / HZ;
 	),
@@ -335,7 +459,7 @@ TRACE_EVENT(balance_dirty_pages,
 		  "bdi_setpoint=%lu bdi_dirty=%lu "
 		  "dirty_ratelimit=%lu task_ratelimit=%lu "
 		  "dirtied=%u dirtied_pause=%u "
-		  "paused=%lu pause=%ld",
+		  "paused=%lu pause=%ld period=%lu think=%ld",
 		  __entry->bdi,
 		  __entry->limit,
 		  __entry->setpoint,
@@ -347,10 +471,41 @@ TRACE_EVENT(balance_dirty_pages,
 		  __entry->dirtied,
 		  __entry->dirtied_pause,
 		  __entry->paused,	/* ms */
-		  __entry->pause	/* ms */
+		  __entry->pause,	/* ms */
+		  __entry->period,	/* ms */
+		  __entry->think	/* ms */
 	  )
 );
 
+TRACE_EVENT(writeback_sb_inodes_requeue,
+
+	TP_PROTO(struct inode *inode),
+	TP_ARGS(inode),
+
+	TP_STRUCT__entry(
+		__array(char, name, 32)
+		__field(unsigned long, ino)
+		__field(unsigned long, state)
+		__field(unsigned long, dirtied_when)
+	),
+
+	TP_fast_assign(
+		strncpy(__entry->name,
+		        dev_name(inode_to_bdi(inode)->dev), 32);
+		__entry->ino		= inode->i_ino;
+		__entry->state		= inode->i_state;
+		__entry->dirtied_when	= inode->dirtied_when;
+	),
+
+	TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu",
+		  __entry->name,
+		  __entry->ino,
+		  show_inode_state(__entry->state),
+		  __entry->dirtied_when,
+		  (jiffies - __entry->dirtied_when) / HZ
+	)
+);
+
 DECLARE_EVENT_CLASS(writeback_congest_waited_template,
 
 	TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
@@ -407,7 +562,7 @@ DECLARE_EVENT_CLASS(writeback_single_inode_template,
 
 	TP_fast_assign(
 		strncpy(__entry->name,
-			dev_name(inode->i_mapping->backing_dev_info->dev), 32);
+			dev_name(inode_to_bdi(inode)->dev), 32);
 		__entry->ino		= inode->i_ino;
 		__entry->state		= inode->i_state;
 		__entry->dirtied_when	= inode->dirtied_when;
@@ -429,7 +584,7 @@ DECLARE_EVENT_CLASS(writeback_single_inode_template,
 	)
 );
 
-DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_requeue,
+DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_start,
 	TP_PROTO(struct inode *inode,
 		 struct writeback_control *wbc,
 		 unsigned long nr_to_write),