This makes the traces friendly to trace-cmd, at the cost of a bit code duplication.
CC: Curt Wohlgemuth <curtw@xxxxxxxxxx>
CC: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
include/trace/events/writeback.h | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
--- linux-next.orig/include/trace/events/writeback.h 2011-12-08 16:44:38.000000000 +0800
+++ linux-next/include/trace/events/writeback.h 2011-12-08 16:53:41.000000000 +0800
@@ -21,6 +21,18 @@
{I_REFERENCED, "I_REFERENCED"} \
)
+#define show_work_reason(reason) \
+ __print_symbolic(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,
@@ -55,7 +67,7 @@ DECLARE_EVENT_CLASS(writeback_work_class
__entry->for_kupdate,
__entry->range_cyclic,
__entry->for_background,
- wb_reason_name[__entry->reason]
+ show_work_reason(__entry->reason)
)
);
#define DEFINE_WRITEBACK_WORK_EVENT(name) \
@@ -184,7 +196,8 @@ 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])
+ show_work_reason(__entry->reason)
+ )
);
TRACE_EVENT(global_dirty_state,
--
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