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authorQu Wenruo <quwenruo@cn.fujitsu.com>2014-03-12 08:05:33 (GMT)
committerChris Mason <clm@fb.com>2014-03-21 00:15:28 (GMT)
commitc3a468915a384c0015263edd9b7263775599a323 (patch)
tree433ed892fc1733ddb28bf1bf2ac61bdac5b42398
parentf094c9bd3e12ee83e91f4249b600d4d2ac0a4738 (diff)
downloadlinux-c3a468915a384c0015263edd9b7263775599a323.tar.xz
btrfs: Add trace for btrfs_workqueue alloc/destroy
Since most of the btrfs_workqueue is printed as pointer address, for easier analysis, add trace for btrfs_workqueue alloc/destroy. So it is possible to determine the workqueue that a given work belongs to(by comparing the wq pointer address with alloc trace event). Signed-off-by: Qu Wenruo <quenruo@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
-rw-r--r--fs/btrfs/async-thread.c7
-rw-r--r--fs/btrfs/async-thread.h2
-rw-r--r--include/trace/events/btrfs.h55
3 files changed, 61 insertions, 3 deletions
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 66532b8..ecb5832 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -56,7 +56,8 @@ struct btrfs_workqueue {
};
static inline struct __btrfs_workqueue
-*__btrfs_alloc_workqueue(char *name, int flags, int max_active, int thresh)
+*__btrfs_alloc_workqueue(const char *name, int flags, int max_active,
+ int thresh)
{
struct __btrfs_workqueue *ret = kzalloc(sizeof(*ret), GFP_NOFS);
@@ -92,13 +93,14 @@ static inline struct __btrfs_workqueue
INIT_LIST_HEAD(&ret->ordered_list);
spin_lock_init(&ret->list_lock);
spin_lock_init(&ret->thres_lock);
+ trace_btrfs_workqueue_alloc(ret, name, flags & WQ_HIGHPRI);
return ret;
}
static inline void
__btrfs_destroy_workqueue(struct __btrfs_workqueue *wq);
-struct btrfs_workqueue *btrfs_alloc_workqueue(char *name,
+struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
int flags,
int max_active,
int thresh)
@@ -305,6 +307,7 @@ static inline void
__btrfs_destroy_workqueue(struct __btrfs_workqueue *wq)
{
destroy_workqueue(wq->normal_wq);
+ trace_btrfs_workqueue_destroy(wq);
kfree(wq);
}
diff --git a/fs/btrfs/async-thread.h b/fs/btrfs/async-thread.h
index 0a891cd..9c6b66d1 100644
--- a/fs/btrfs/async-thread.h
+++ b/fs/btrfs/async-thread.h
@@ -38,7 +38,7 @@ struct btrfs_work {
unsigned long flags;
};
-struct btrfs_workqueue *btrfs_alloc_workqueue(char *name,
+struct btrfs_workqueue *btrfs_alloc_workqueue(const char *name,
int flags,
int max_active,
int thresh);
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index c346919..4ee4e30 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -22,6 +22,7 @@ struct btrfs_free_cluster;
struct map_lookup;
struct extent_buffer;
struct btrfs_work;
+struct __btrfs_workqueue;
#define show_ref_type(type) \
__print_symbolic(type, \
@@ -1063,6 +1064,60 @@ DEFINE_EVENT(btrfs__work, btrfs_ordered_sched,
TP_ARGS(work)
);
+DECLARE_EVENT_CLASS(btrfs__workqueue,
+
+ TP_PROTO(struct __btrfs_workqueue *wq, const char *name, int high),
+
+ TP_ARGS(wq, name, high),
+
+ TP_STRUCT__entry(
+ __field( void *, wq )
+ __string( name, name )
+ __field( int , high )
+ ),
+
+ TP_fast_assign(
+ __entry->wq = wq;
+ __assign_str(name, name);
+ __entry->high = high;
+ ),
+
+ TP_printk("name=%s%s, wq=%p", __get_str(name),
+ __print_flags(__entry->high, "",
+ {(WQ_HIGHPRI), "-high"}),
+ __entry->wq)
+);
+
+DEFINE_EVENT(btrfs__workqueue, btrfs_workqueue_alloc,
+
+ TP_PROTO(struct __btrfs_workqueue *wq, const char *name, int high),
+
+ TP_ARGS(wq, name, high)
+);
+
+DECLARE_EVENT_CLASS(btrfs__workqueue_done,
+
+ TP_PROTO(struct __btrfs_workqueue *wq),
+
+ TP_ARGS(wq),
+
+ TP_STRUCT__entry(
+ __field( void *, wq )
+ ),
+
+ TP_fast_assign(
+ __entry->wq = wq;
+ ),
+
+ TP_printk("wq=%p", __entry->wq)
+);
+
+DEFINE_EVENT(btrfs__workqueue_done, btrfs_workqueue_destroy,
+
+ TP_PROTO(struct __btrfs_workqueue *wq),
+
+ TP_ARGS(wq)
+);
#endif /* _TRACE_BTRFS_H */