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writeback: show writeback reason with __print_symbolic

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This makes the binary trace understandable by trace-cmd.

CC: Dave Chinner <david@fromorbit.com>
CC: Curt Wohlgemuth <curtw@google.com>
CC: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
This commit is contained in:
Wu Fengguang 2011-12-08 16:53:54 -06:00
parent 384703b8e6
commit b3bba872dd
2 changed files with 13 additions and 13 deletions
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11
fs/fs-writeback.c
View file

@ -47,17 +47,6 @@ struct wb_writeback_work {
struct completion *done; /* set if the caller waits */
};
const char *wb_reason_name[] = {
[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"
};
/*
* Include the creation of the trace points after defining the
* wb_writeback_work structure so that the definition remains local to this

15
include/trace/events/writeback.h
View file

@ -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,
@ -55,7 +65,7 @@ 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 +194,8 @@ 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,