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authorWu Fengguang <fengguang.wu@intel.com>2011-12-08 23:53:54 +0100
committerWu Fengguang <fengguang.wu@intel.com>2011-12-18 07:20:17 +0100
commitb3bba872ddb0320a7ecb54decae53c13ceb2ed4c (patch)
treeed47c72d9193d40173e319663d4e1eb1c60a7d15
parentLinux 3.2-rc6 (diff)
downloadlinux-b3bba872ddb0320a7ecb54decae53c13ceb2ed4c.tar.xz
linux-b3bba872ddb0320a7ecb54decae53c13ceb2ed4c.zip
writeback: show writeback reason with __print_symbolic
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>
-rw-r--r--fs/fs-writeback.c11
-rw-r--r--include/trace/events/writeback.h15
2 files changed, 13 insertions, 13 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ac86f8b3e3cb..517f211a3bd4 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -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
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index b99caa8b780c..99d1d0decf88 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,
@@ -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,