Merge branch 'next' into for-linus

10 files changed, 470 insertions, 33 deletions

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index b31702ac15be..84f3001a568d 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -16,6 +16,8 @@ struct btrfs_delayed_ref_node;
 struct btrfs_delayed_tree_ref;
 struct btrfs_delayed_data_ref;
 struct btrfs_delayed_ref_head;
+struct btrfs_block_group_cache;
+struct btrfs_free_cluster;
 struct map_lookup;
 struct extent_buffer;
 
@@ -44,6 +46,17 @@ struct extent_buffer;
 	obj, ((obj >= BTRFS_DATA_RELOC_TREE_OBJECTID) ||		\
 	      (obj <= BTRFS_CSUM_TREE_OBJECTID )) ? __show_root_type(obj) : "-"
 
+#define BTRFS_GROUP_FLAGS	\
+	{ BTRFS_BLOCK_GROUP_DATA,	"DATA"}, \
+	{ BTRFS_BLOCK_GROUP_SYSTEM,	"SYSTEM"}, \
+	{ BTRFS_BLOCK_GROUP_METADATA,	"METADATA"}, \
+	{ BTRFS_BLOCK_GROUP_RAID0,	"RAID0"}, \
+	{ BTRFS_BLOCK_GROUP_RAID1,	"RAID1"}, \
+	{ BTRFS_BLOCK_GROUP_DUP,	"DUP"}, \
+	{ BTRFS_BLOCK_GROUP_RAID10,	"RAID10"}
+
+#define BTRFS_UUID_SIZE 16
+
 TRACE_EVENT(btrfs_transaction_commit,
 
 	TP_PROTO(struct btrfs_root *root),
@@ -621,6 +634,34 @@ TRACE_EVENT(btrfs_cow_block,
 		  __entry->cow_level)
 );
 
+TRACE_EVENT(btrfs_space_reservation,
+
+	TP_PROTO(struct btrfs_fs_info *fs_info, char *type, u64 val,
+		 u64 bytes, int reserve),
+
+	TP_ARGS(fs_info, type, val, bytes, reserve),
+
+	TP_STRUCT__entry(
+		__array(	u8,	fsid,	BTRFS_UUID_SIZE	)
+		__string(	type,	type			)
+		__field(	u64,	val			)
+		__field(	u64,	bytes			)
+		__field(	int,	reserve			)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->fsid, fs_info->fsid, BTRFS_UUID_SIZE);
+		__assign_str(type, type);
+		__entry->val		= val;
+		__entry->bytes		= bytes;
+		__entry->reserve	= reserve;
+	),
+
+	TP_printk("%pU: %s: %Lu %s %Lu", __entry->fsid, __get_str(type),
+		  __entry->val, __entry->reserve ? "reserve" : "release",
+		  __entry->bytes)
+);
+
 DECLARE_EVENT_CLASS(btrfs__reserved_extent,
 
 	TP_PROTO(struct btrfs_root *root, u64 start, u64 len),
@@ -659,6 +700,168 @@ DEFINE_EVENT(btrfs__reserved_extent,  btrfs_reserved_extent_free,
 	TP_ARGS(root, start, len)
 );
 
+TRACE_EVENT(find_free_extent,
+
+	TP_PROTO(struct btrfs_root *root, u64 num_bytes, u64 empty_size,
+		 u64 data),
+
+	TP_ARGS(root, num_bytes, empty_size, data),
+
+	TP_STRUCT__entry(
+		__field(	u64,	root_objectid		)
+		__field(	u64,	num_bytes		)
+		__field(	u64,	empty_size		)
+		__field(	u64,	data			)
+	),
+
+	TP_fast_assign(
+		__entry->root_objectid	= root->root_key.objectid;
+		__entry->num_bytes	= num_bytes;
+		__entry->empty_size	= empty_size;
+		__entry->data		= data;
+	),
+
+	TP_printk("root = %Lu(%s), len = %Lu, empty_size = %Lu, "
+		  "flags = %Lu(%s)", show_root_type(__entry->root_objectid),
+		  __entry->num_bytes, __entry->empty_size, __entry->data,
+		  __print_flags((unsigned long)__entry->data, "|",
+				 BTRFS_GROUP_FLAGS))
+);
+
+DECLARE_EVENT_CLASS(btrfs__reserve_extent,
+
+	TP_PROTO(struct btrfs_root *root,
+		 struct btrfs_block_group_cache *block_group, u64 start,
+		 u64 len),
+
+	TP_ARGS(root, block_group, start, len),
+
+	TP_STRUCT__entry(
+		__field(	u64,	root_objectid		)
+		__field(	u64,	bg_objectid		)
+		__field(	u64,	flags			)
+		__field(	u64,	start			)
+		__field(	u64,	len			)
+	),
+
+	TP_fast_assign(
+		__entry->root_objectid	= root->root_key.objectid;
+		__entry->bg_objectid	= block_group->key.objectid;
+		__entry->flags		= block_group->flags;
+		__entry->start		= start;
+		__entry->len		= len;
+	),
+
+	TP_printk("root = %Lu(%s), block_group = %Lu, flags = %Lu(%s), "
+		  "start = %Lu, len = %Lu",
+		  show_root_type(__entry->root_objectid), __entry->bg_objectid,
+		  __entry->flags, __print_flags((unsigned long)__entry->flags,
+						"|", BTRFS_GROUP_FLAGS),
+		  __entry->start, __entry->len)
+);
+
+DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent,
+
+	TP_PROTO(struct btrfs_root *root,
+		 struct btrfs_block_group_cache *block_group, u64 start,
+		 u64 len),
+
+	TP_ARGS(root, block_group, start, len)
+);
+
+DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent_cluster,
+
+	TP_PROTO(struct btrfs_root *root,
+		 struct btrfs_block_group_cache *block_group, u64 start,
+		 u64 len),
+
+	TP_ARGS(root, block_group, start, len)
+);
+
+TRACE_EVENT(btrfs_find_cluster,
+
+	TP_PROTO(struct btrfs_block_group_cache *block_group, u64 start,
+		 u64 bytes, u64 empty_size, u64 min_bytes),
+
+	TP_ARGS(block_group, start, bytes, empty_size, min_bytes),
+
+	TP_STRUCT__entry(
+		__field(	u64,	bg_objectid		)
+		__field(	u64,	flags			)
+		__field(	u64,	start			)
+		__field(	u64,	bytes			)
+		__field(	u64,	empty_size		)
+		__field(	u64,	min_bytes		)
+	),
+
+	TP_fast_assign(
+		__entry->bg_objectid	= block_group->key.objectid;
+		__entry->flags		= block_group->flags;
+		__entry->start		= start;
+		__entry->bytes		= bytes;
+		__entry->empty_size	= empty_size;
+		__entry->min_bytes	= min_bytes;
+	),
+
+	TP_printk("block_group = %Lu, flags = %Lu(%s), start = %Lu, len = %Lu,"
+		  " empty_size = %Lu, min_bytes = %Lu", __entry->bg_objectid,
+		  __entry->flags,
+		  __print_flags((unsigned long)__entry->flags, "|",
+				BTRFS_GROUP_FLAGS), __entry->start,
+		  __entry->bytes, __entry->empty_size,  __entry->min_bytes)
+);
+
+TRACE_EVENT(btrfs_failed_cluster_setup,
+
+	TP_PROTO(struct btrfs_block_group_cache *block_group),
+
+	TP_ARGS(block_group),
+
+	TP_STRUCT__entry(
+		__field(	u64,	bg_objectid		)
+	),
+
+	TP_fast_assign(
+		__entry->bg_objectid	= block_group->key.objectid;
+	),
+
+	TP_printk("block_group = %Lu", __entry->bg_objectid)
+);
+
+TRACE_EVENT(btrfs_setup_cluster,
+
+	TP_PROTO(struct btrfs_block_group_cache *block_group,
+		 struct btrfs_free_cluster *cluster, u64 size, int bitmap),
+
+	TP_ARGS(block_group, cluster, size, bitmap),
+
+	TP_STRUCT__entry(
+		__field(	u64,	bg_objectid		)
+		__field(	u64,	flags			)
+		__field(	u64,	start			)
+		__field(	u64,	max_size		)
+		__field(	u64,	size			)
+		__field(	int,	bitmap			)
+	),
+
+	TP_fast_assign(
+		__entry->bg_objectid	= block_group->key.objectid;
+		__entry->flags		= block_group->flags;
+		__entry->start		= cluster->window_start;
+		__entry->max_size	= cluster->max_size;
+		__entry->size		= size;
+		__entry->bitmap		= bitmap;
+	),
+
+	TP_printk("block_group = %Lu, flags = %Lu(%s), window_start = %Lu, "
+		  "size = %Lu, max_size = %Lu, bitmap = %d",
+		  __entry->bg_objectid,
+		  __entry->flags,
+		  __print_flags((unsigned long)__entry->flags, "|",
+				BTRFS_GROUP_FLAGS), __entry->start,
+		  __entry->size, __entry->max_size, __entry->bitmap)
+);
+
 #endif /* _TRACE_BTRFS_H */
 
 /* This part must be outside protection */
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 748ff7cbe555..319538bf17d2 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -573,9 +573,9 @@ TRACE_EVENT(ext4_mb_release_inode_pa,
 );
 
 TRACE_EVENT(ext4_mb_release_group_pa,
-	TP_PROTO(struct ext4_prealloc_space *pa),
+	TP_PROTO(struct super_block *sb, struct ext4_prealloc_space *pa),
 
-	TP_ARGS(pa),
+	TP_ARGS(sb, pa),
 
 	TP_STRUCT__entry(
 		__field(	dev_t,	dev			)
@@ -585,7 +585,7 @@ TRACE_EVENT(ext4_mb_release_group_pa,
 	),
 
 	TP_fast_assign(
-		__entry->dev		= pa->pa_inode->i_sb->s_dev;
+		__entry->dev		= sb->s_dev;
 		__entry->pa_pstart	= pa->pa_pstart;
 		__entry->pa_len		= pa->pa_len;
 	),
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index a9c87ad8331c..5f889f16b0c8 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -147,7 +147,7 @@ DEFINE_EVENT(kmem_free, kmem_cache_free,
 	TP_ARGS(call_site, ptr)
 );
 
-TRACE_EVENT(mm_page_free_direct,
+TRACE_EVENT(mm_page_free,
 
 	TP_PROTO(struct page *page, unsigned int order),
 
@@ -169,7 +169,7 @@ TRACE_EVENT(mm_page_free_direct,
 			__entry->order)
 );
 
-TRACE_EVENT(mm_pagevec_free,
+TRACE_EVENT(mm_page_free_batched,
 
 	TP_PROTO(struct page *page, int cold),
 
diff --git a/include/trace/events/oom.h b/include/trace/events/oom.h
new file mode 100644
index 000000000000..dd4ba3b92002
--- /dev/null
+++ b/include/trace/events/oom.h
@@ -0,0 +1,33 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM oom
+
+#if !defined(_TRACE_OOM_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_OOM_H
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(oom_score_adj_update,
+
+	TP_PROTO(struct task_struct *task),
+
+	TP_ARGS(task),
+
+	TP_STRUCT__entry(
+		__field(	pid_t,	pid)
+		__array(	char,	comm,	TASK_COMM_LEN )
+		__field(	 int,	oom_score_adj)
+	),
+
+	TP_fast_assign(
+		__entry->pid = task->pid;
+		memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
+		__entry->oom_score_adj = task->signal->oom_score_adj;
+	),
+
+	TP_printk("pid=%d comm=%s oom_score_adj=%d",
+		__entry->pid, __entry->comm, __entry->oom_score_adj)
+);
+
+#endif
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index 669fbd62ec25..d2d88bed891b 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -241,24 +241,73 @@ TRACE_EVENT(rcu_fqs,
 
 /*
  * Tracepoint for dyntick-idle entry/exit events.  These take a string
- * as argument: "Start" for entering dyntick-idle mode and "End" for
- * leaving it.
+ * as argument: "Start" for entering dyntick-idle mode, "End" for
+ * leaving it, "--=" for events moving towards idle, and "++=" for events
+ * moving away from idle.  "Error on entry: not idle task" and "Error on
+ * exit: not idle task" indicate that a non-idle task is erroneously
+ * toying with the idle loop.
+ *
+ * These events also take a pair of numbers, which indicate the nesting
+ * depth before and after the event of interest.  Note that task-related
+ * events use the upper bits of each number, while interrupt-related
+ * events use the lower bits.
  */
 TRACE_EVENT(rcu_dyntick,
 
-	TP_PROTO(char *polarity),
+	TP_PROTO(char *polarity, long long oldnesting, long long newnesting),
 
-	TP_ARGS(polarity),
+	TP_ARGS(polarity, oldnesting, newnesting),
 
 	TP_STRUCT__entry(
 		__field(char *, polarity)
+		__field(long long, oldnesting)
+		__field(long long, newnesting)
 	),
 
 	TP_fast_assign(
 		__entry->polarity = polarity;
+		__entry->oldnesting = oldnesting;
+		__entry->newnesting = newnesting;
+	),
+
+	TP_printk("%s %llx %llx", __entry->polarity,
+		  __entry->oldnesting, __entry->newnesting)
+);
+
+/*
+ * Tracepoint for RCU preparation for idle, the goal being to get RCU
+ * processing done so that the current CPU can shut off its scheduling
+ * clock and enter dyntick-idle mode.  One way to accomplish this is
+ * to drain all RCU callbacks from this CPU, and the other is to have
+ * done everything RCU requires for the current grace period.  In this
+ * latter case, the CPU will be awakened at the end of the current grace
+ * period in order to process the remainder of its callbacks.
+ *
+ * These tracepoints take a string as argument:
+ *
+ *	"No callbacks": Nothing to do, no callbacks on this CPU.
+ *	"In holdoff": Nothing to do, holding off after unsuccessful attempt.
+ *	"Begin holdoff": Attempt failed, don't retry until next jiffy.
+ *	"Dyntick with callbacks": Entering dyntick-idle despite callbacks.
+ *	"More callbacks": Still more callbacks, try again to clear them out.
+ *	"Callbacks drained": All callbacks processed, off to dyntick idle!
+ *	"Timer": Timer fired to cause CPU to continue processing callbacks.
+ */
+TRACE_EVENT(rcu_prep_idle,
+
+	TP_PROTO(char *reason),
+
+	TP_ARGS(reason),
+
+	TP_STRUCT__entry(
+		__field(char *, reason)
+	),
+
+	TP_fast_assign(
+		__entry->reason = reason;
 	),
 
-	TP_printk("%s", __entry->polarity)
+	TP_printk("%s", __entry->reason)
 );
 
 /*
@@ -412,27 +461,71 @@ TRACE_EVENT(rcu_invoke_kfree_callback,
 
 /*
  * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
- * invoked.  The first argument is the name of the RCU flavor and
- * the second argument is number of callbacks actually invoked.
+ * invoked.  The first argument is the name of the RCU flavor,
+ * the second argument is number of callbacks actually invoked,
+ * the third argument (cb) is whether or not any of the callbacks that
+ * were ready to invoke at the beginning of this batch are still
+ * queued, the fourth argument (nr) is the return value of need_resched(),
+ * the fifth argument (iit) is 1 if the current task is the idle task,
+ * and the sixth argument (risk) is the return value from
+ * rcu_is_callbacks_kthread().
  */
 TRACE_EVENT(rcu_batch_end,
 
-	TP_PROTO(char *rcuname, int callbacks_invoked),
+	TP_PROTO(char *rcuname, int callbacks_invoked,
+		 bool cb, bool nr, bool iit, bool risk),
 
-	TP_ARGS(rcuname, callbacks_invoked),
+	TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
 
 	TP_STRUCT__entry(
 		__field(char *, rcuname)
 		__field(int, callbacks_invoked)
+		__field(bool, cb)
+		__field(bool, nr)
+		__field(bool, iit)
+		__field(bool, risk)
 	),
 
 	TP_fast_assign(
 		__entry->rcuname = rcuname;
 		__entry->callbacks_invoked = callbacks_invoked;
+		__entry->cb = cb;
+		__entry->nr = nr;
+		__entry->iit = iit;
+		__entry->risk = risk;
+	),
+
+	TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
+		  __entry->rcuname, __entry->callbacks_invoked,
+		  __entry->cb ? 'C' : '.',
+		  __entry->nr ? 'S' : '.',
+		  __entry->iit ? 'I' : '.',
+		  __entry->risk ? 'R' : '.')
+);
+
+/*
+ * Tracepoint for rcutorture readers.  The first argument is the name
+ * of the RCU flavor from rcutorture's viewpoint and the second argument
+ * is the callback address.
+ */
+TRACE_EVENT(rcu_torture_read,
+
+	TP_PROTO(char *rcutorturename, struct rcu_head *rhp),
+
+	TP_ARGS(rcutorturename, rhp),
+
+	TP_STRUCT__entry(
+		__field(char *, rcutorturename)
+		__field(struct rcu_head *, rhp)
+	),
+
+	TP_fast_assign(
+		__entry->rcutorturename = rcutorturename;
+		__entry->rhp = rhp;
 	),
 
-	TP_printk("%s CBs-invoked=%d",
-		  __entry->rcuname, __entry->callbacks_invoked)
+	TP_printk("%s torture read %p",
+		  __entry->rcutorturename, __entry->rhp)
 );
 
 #else /* #ifdef CONFIG_RCU_TRACE */
@@ -443,13 +536,16 @@ TRACE_EVENT(rcu_batch_end,
 #define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
 #define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks) do { } while (0)
 #define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
-#define trace_rcu_dyntick(polarity) do { } while (0)
+#define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
+#define trace_rcu_prep_idle(reason) do { } while (0)
 #define trace_rcu_callback(rcuname, rhp, qlen) do { } while (0)
 #define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen) do { } while (0)
 #define trace_rcu_batch_start(rcuname, qlen, blimit) do { } while (0)
 #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
 #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
-#define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0)
+#define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
+	do { } while (0)
+#define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
 
 #endif /* #else #ifdef CONFIG_RCU_TRACE */
 
diff --git a/include/trace/events/regmap.h b/include/trace/events/regmap.h
index 1e3193b8fcc8..12fbf43524e9 100644
--- a/include/trace/events/regmap.h
+++ b/include/trace/events/regmap.h
@@ -55,6 +55,15 @@ DEFINE_EVENT(regmap_reg, regmap_reg_read,
 
 );
 
+DEFINE_EVENT(regmap_reg, regmap_reg_read_cache,
+
+	TP_PROTO(struct device *dev, unsigned int reg,
+		 unsigned int val),
+
+	TP_ARGS(dev, reg, val)
+
+);
+
 DECLARE_EVENT_CLASS(regmap_block,
 
 	TP_PROTO(struct device *dev, unsigned int reg, int count),
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 959ff18b63b6..e33ed1bfa113 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -331,6 +331,13 @@ DEFINE_EVENT(sched_stat_template, sched_stat_iowait,
 	     TP_ARGS(tsk, delay));
 
 /*
+ * Tracepoint for accounting blocked time (time the task is in uninterruptible).
+ */
+DEFINE_EVENT(sched_stat_template, sched_stat_blocked,
+	     TP_PROTO(struct task_struct *tsk, u64 delay),
+	     TP_ARGS(tsk, delay));
+
+/*
  * Tracepoint for accounting runtime (time the task is executing
  * on a CPU).
  */
diff --git a/include/trace/events/task.h b/include/trace/events/task.h
new file mode 100644
index 000000000000..b53add02e929
--- /dev/null
+++ b/include/trace/events/task.h
@@ -0,0 +1,61 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM task
+
+#if !defined(_TRACE_TASK_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_TASK_H
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(task_newtask,
+
+	TP_PROTO(struct task_struct *task, unsigned long clone_flags),
+
+	TP_ARGS(task, clone_flags),
+
+	TP_STRUCT__entry(
+		__field(	pid_t,	pid)
+		__array(	char,	comm, TASK_COMM_LEN)
+		__field( unsigned long, clone_flags)
+		__field(	int,    oom_score_adj)
+	),
+
+	TP_fast_assign(
+		__entry->pid = task->pid;
+		memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
+		__entry->clone_flags = clone_flags;
+		__entry->oom_score_adj = task->signal->oom_score_adj;
+	),
+
+	TP_printk("pid=%d comm=%s clone_flags=%lx oom_score_adj=%d",
+		__entry->pid, __entry->comm,
+		__entry->clone_flags, __entry->oom_score_adj)
+);
+
+TRACE_EVENT(task_rename,
+
+	TP_PROTO(struct task_struct *task, char *comm),
+
+	TP_ARGS(task, comm),
+
+	TP_STRUCT__entry(
+		__field(	pid_t,	pid)
+		__array(	char, oldcomm,  TASK_COMM_LEN)
+		__array(	char, newcomm,  TASK_COMM_LEN)
+		__field(	int, oom_score_adj)
+	),
+
+	TP_fast_assign(
+		__entry->pid = task->pid;
+		memcpy(entry->oldcomm, task->comm, TASK_COMM_LEN);
+		memcpy(entry->newcomm, comm, TASK_COMM_LEN);
+		__entry->oom_score_adj = task->signal->oom_score_adj;
+	),
+
+	TP_printk("pid=%d oldcomm=%s newcomm=%s oom_score_adj=%d",
+		__entry->pid, __entry->oldcomm,
+		__entry->newcomm, __entry->oom_score_adj)
+);
+
+#endif
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index edc4b3d25a2d..f64560e204bc 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -266,9 +266,10 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
 		unsigned long nr_lumpy_taken,
 		unsigned long nr_lumpy_dirty,
 		unsigned long nr_lumpy_failed,
-		isolate_mode_t isolate_mode),
+		isolate_mode_t isolate_mode,
+		int file),
 
-	TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode),
+	TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode, file),
 
 	TP_STRUCT__entry(
 		__field(int, order)
@@ -279,6 +280,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
 		__field(unsigned long, nr_lumpy_dirty)
 		__field(unsigned long, nr_lumpy_failed)
 		__field(isolate_mode_t, isolate_mode)
+		__field(int, file)
 	),
 
 	TP_fast_assign(
@@ -290,9 +292,10 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
 		__entry->nr_lumpy_dirty = nr_lumpy_dirty;
 		__entry->nr_lumpy_failed = nr_lumpy_failed;
 		__entry->isolate_mode = isolate_mode;
+		__entry->file = file;
 	),
 
-	TP_printk("isolate_mode=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu contig_taken=%lu contig_dirty=%lu contig_failed=%lu",
+	TP_printk("isolate_mode=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu contig_taken=%lu contig_dirty=%lu contig_failed=%lu file=%d",
 		__entry->isolate_mode,
 		__entry->order,
 		__entry->nr_requested,
@@ -300,7 +303,8 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
 		__entry->nr_taken,
 		__entry->nr_lumpy_taken,
 		__entry->nr_lumpy_dirty,
-		__entry->nr_lumpy_failed)
+		__entry->nr_lumpy_failed,
+		__entry->file)
 );
 
 DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
@@ -312,9 +316,10 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
 		unsigned long nr_lumpy_taken,
 		unsigned long nr_lumpy_dirty,
 		unsigned long nr_lumpy_failed,
-		isolate_mode_t isolate_mode),
+		isolate_mode_t isolate_mode,
+		int file),
 
-	TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
+	TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode, file)
 
 );
 
@@ -327,9 +332,10 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate,
 		unsigned long nr_lumpy_taken,
 		unsigned long nr_lumpy_dirty,
 		unsigned long nr_lumpy_failed,
-		isolate_mode_t isolate_mode),
+		isolate_mode_t isolate_mode,
+		int file),
 
-	TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
+	TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode, file)
 
 );
 
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index b99caa8b780c..5973410e8f8c 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -21,6 +21,16 @@
 		{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;
 
 DECLARE_EVENT_CLASS(writeback_work_class,
@@ -37,7 +47,10 @@ 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;
@@ -55,7 +68,7 @@ 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) \
@@ -184,7 +197,8 @@ 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 +303,13 @@ 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 +324,8 @@ 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 +342,9 @@ 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 +355,7 @@ 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,
@@ -347,7 +367,9 @@ 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 */
 	  )
 );
 
@@ -407,7 +429,7 @@ 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;