diff options
| author |   Paul E. McKenney <paul.mckenney@linaro.org> | 2011-10-02 07:44:32 -0700 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-12-11 10:31:26 -0800 |
| commit | 91afaf300269aa99a4d646969b3258b74294ac4d (patch) | |
| tree | b4d7dd5f5c9933be7873b206624f7b55eb25d906 /include/trace/events/rcu.h | |
| parent | trace: Allow ftrace_dump() to be called from modules (diff) | |
| download | linux-dev-91afaf300269aa99a4d646969b3258b74294ac4d.tar.xz linux-dev-91afaf300269aa99a4d646969b3258b74294ac4d.zip | |
rcu: Add failure tracing to rcutorture
Trace the rcutorture RCU accesses and dump the trace buffer when the
first failure is detected.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'include/trace/events/rcu.h')
| -rw-r--r-- | include/trace/events/rcu.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h index e5771804c507..172620a92b1a 100644 --- a/include/trace/events/rcu.h +++ b/include/trace/events/rcu.h @@ -437,6 +437,31 @@ TRACE_EVENT(rcu_batch_end, __entry->rcuname, __entry->callbacks_invoked) ); +/* + * Tracepoint for rcutorture readers. The first argument is the name + * of the RCU flavor from rcutorture's viewpoint and the second argument + * is the callback address. + */ +TRACE_EVENT(rcu_torture_read, + + TP_PROTO(char *rcutorturename, struct rcu_head *rhp), + + TP_ARGS(rcutorturename, rhp), + + TP_STRUCT__entry( + __field(char *, rcutorturename) + __field(struct rcu_head *, rhp) + ), + + TP_fast_assign( + __entry->rcutorturename = rcutorturename; + __entry->rhp = rhp; + ), + + TP_printk("%s torture read %p", + __entry->rcutorturename, __entry->rhp) +); + #else /* #ifdef CONFIG_RCU_TRACE */ #define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0) @@ -452,6 +477,7 @@ TRACE_EVENT(rcu_batch_end, #define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0) #define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0) #define trace_rcu_batch_end(rcuname, callbacks_invoked) do { } while (0) +#define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0) #endif /* #else #ifdef CONFIG_RCU_TRACE */ |