From c3a468915a384c0015263edd9b7263775599a323 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Wed, 12 Mar 2014 08:05:33 +0000 Subject: [PATCH] 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 Signed-off-by: Chris Mason --- fs/btrfs/async-thread.c | 7 +++-- fs/btrfs/async-thread.h | 2 +- include/trace/events/btrfs.h | 55 ++++++++++++++++++++++++++++++++++++ 3 files changed, 61 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c index 66532b8f0f7c..ecb5832c0967 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 0a891cdc4c28..9c6b66d15fb0 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 c346919254a9..4ee4e30d26d9 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 */ -- 2.20.1