Commit-ID: 883a2a3189dae9d2912c417e47152f51cb922a3f
Gitweb: http://git.kernel.org/tip/883a2a3189dae9d2912c417e47152f51cb922a3f
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Sat, 8 May 2010 06:16:11 +0200
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Sun, 9 May 2010 13:45:32 +0200
tracing: Drop lock_acquired waittime field
Drop the waittime field from the lock_acquired event, we can
calculate it by substracting the lock_acquired event timestamp
with the matching lock_acquire one.
It is not needed and takes useless space in the traces.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Hitoshi Mitake <mitake@xxxxxxxxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
include/trace/events/lock.h | 11 ++++-------
kernel/lockdep.c | 2 +-
2 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/include/trace/events/lock.h b/include/trace/events/lock.h
index 5c1dcfc..17ca287 100644
--- a/include/trace/events/lock.h
+++ b/include/trace/events/lock.h
@@ -78,24 +78,21 @@ TRACE_EVENT(lock_contended,
);
TRACE_EVENT(lock_acquired,
- TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
+ TP_PROTO(struct lockdep_map *lock, unsigned long ip),
- TP_ARGS(lock, ip, waittime),
+ TP_ARGS(lock, ip),
TP_STRUCT__entry(
__string(name, lock->name)
- __field(s64, wait_nsec)
__field(void *, lockdep_addr)
),
TP_fast_assign(
__assign_str(name, lock->name);
- __entry->wait_nsec = waittime;
__entry->lockdep_addr = lock;
),
- TP_printk("%p %s (%llu ns)", __entry->lockdep_addr,
- __get_str(name),
- __entry->wait_nsec)
+ TP_printk("%p %s", __entry->lockdep_addr,
+ __get_str(name))
);
#endif
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 2594e1c..31e22e7 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -3380,7 +3380,7 @@ found_it:
hlock->holdtime_stamp = now;
}
- trace_lock_acquired(lock, ip, waittime);
+ trace_lock_acquired(lock, ip);
stats = get_lock_stats(hlock_class(hlock));
if (waittime) {
--
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