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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-10-02 07:44:32 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-12-11 10:31:26 -0800
commit91afaf300269aa99a4d646969b3258b74294ac4d (patch)
treeb4d7dd5f5c9933be7873b206624f7b55eb25d906 /include/trace
parenta8eecf2248a45bf69f0625b23c003ad2ccd765ee (diff)
downloadlinux-linaro-stable-91afaf300269aa99a4d646969b3258b74294ac4d.tar.gz
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')
-rw-r--r--include/trace/events/rcu.h26
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 */