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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-11-17 13:35:28 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-05 17:58:22 -0800
commit18aff33e7314253b9437234bd6d69ddc4827de70 (patch)
tree4848353b2ff65620350375cdd4205856f7b8fe63 /kernel/rcu
parent91bf6a83e5a121c9313ae47156dd47df46ea2aac (diff)
downloadlinux-sh-18aff33e7314253b9437234bd6d69ddc4827de70.tar.gz
rcutorture: Print symbolic name for rcu_torture_writer_state
Currently, rcu_torture_writer_state is printed as an integer, which slows debugging. This commit therefore prints a symbolic name in addition to the integer. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> [ paulmck: More "const", as suggested by Josh Triplett. ] Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/rcutorture.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index d89328e260df..d2988d047d66 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -162,6 +162,27 @@ static int rcu_torture_writer_state;
#define RTWS_SYNC 7
#define RTWS_STUTTER 8
#define RTWS_STOPPING 9
+static const char * const rcu_torture_writer_state_names[] = {
+ "RTWS_FIXED_DELAY",
+ "RTWS_DELAY",
+ "RTWS_REPLACE",
+ "RTWS_DEF_FREE",
+ "RTWS_EXP_SYNC",
+ "RTWS_COND_GET",
+ "RTWS_COND_SYNC",
+ "RTWS_SYNC",
+ "RTWS_STUTTER",
+ "RTWS_STOPPING",
+};
+
+static const char *rcu_torture_writer_state_getname(void)
+{
+ unsigned int i = READ_ONCE(rcu_torture_writer_state);
+
+ if (i >= ARRAY_SIZE(rcu_torture_writer_state_names))
+ return "???";
+ return rcu_torture_writer_state_names[i];
+}
#if defined(MODULE) || defined(CONFIG_RCU_TORTURE_TEST_RUNNABLE)
#define RCUTORTURE_RUNNABLE_INIT 1
@@ -1307,7 +1328,8 @@ rcu_torture_stats_print(void)
rcutorture_get_gp_data(cur_ops->ttype,
&flags, &gpnum, &completed);
- pr_alert("??? Writer stall state %d g%lu c%lu f%#x\n",
+ pr_alert("??? Writer stall state %s(%d) g%lu c%lu f%#x\n",
+ rcu_torture_writer_state_getname(),
rcu_torture_writer_state,
gpnum, completed, flags);
show_rcu_gp_kthreads();