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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-19 10:51:42 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-05-13 11:18:18 -0700
commitad0dc7f94dbf417b1c7d42e1f0b250f045b27f8f (patch)
tree7ab989cc1da5014778a7bd24ec94184104e5b517 /include/linux/rcupdate.h
parentc9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff)
downloadop-kernel-dev-ad0dc7f94dbf417b1c7d42e1f0b250f045b27f8f.zip
op-kernel-dev-ad0dc7f94dbf417b1c7d42e1f0b250f045b27f8f.tar.gz
rcutorture: Add forward-progress checking for writer
The rcutorture output currently does not distinguish between stalls in the RCU implementation and stalls in the rcu_torture_writer() kthreads. This commit therefore adds some diagnostics to help distinguish between these two conditions, at least for the non-SRCU implementations. (SRCU does not provide evidence of update-side forward progress by design.) Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 00a7fd6..8297373 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -51,7 +51,17 @@ extern int rcu_expedited; /* for sysctl */
extern int rcutorture_runnable; /* for sysctl */
#endif /* #ifdef CONFIG_RCU_TORTURE_TEST */
+enum rcutorture_type {
+ RCU_FLAVOR,
+ RCU_BH_FLAVOR,
+ RCU_SCHED_FLAVOR,
+ SRCU_FLAVOR,
+ INVALID_RCU_FLAVOR
+};
+
#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU)
+void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
+ unsigned long *gpnum, unsigned long *completed);
void rcutorture_record_test_transition(void);
void rcutorture_record_progress(unsigned long vernum);
void do_trace_rcu_torture_read(const char *rcutorturename,
@@ -60,6 +70,15 @@ void do_trace_rcu_torture_read(const char *rcutorturename,
unsigned long c_old,
unsigned long c);
#else
+static inline void rcutorture_get_gp_data(enum rcutorture_type test_type,
+ int *flags,
+ unsigned long *gpnum,
+ unsigned long *completed)
+{
+ *flags = 0;
+ *gpnum = 0;
+ *completed = 0;
+}
static inline void rcutorture_record_test_transition(void)
{
}
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