This commit adds the numeric and string version of ->srcu_size_state to
the Tree-SRCU-specific portion of the rcutorture output.
[ paulmck: Apply feedback from kernel test robot and Dan Carpenter. ]
[ quic_neeraju: Apply feedback from Jiapeng Chong. ]
Co-developed-by: Neeraj Upadhyay <quic_neeraju@xxxxxxxxxxx>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@xxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
kernel/rcu/srcutree.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c
index 00f9aed6f7b9..0874e3be6a5a 100644
--- a/kernel/rcu/srcutree.c
+++ b/kernel/rcu/srcutree.c
@@ -1407,15 +1407,33 @@ void srcutorture_get_gp_data(enum rcutorture_type test_type,
}
EXPORT_SYMBOL_GPL(srcutorture_get_gp_data);
+static const char * const srcu_size_state_name[] = {
+ "SRCU_SIZE_SMALL",
+ "SRCU_SIZE_ALLOC",
+ "SRCU_SIZE_WAIT_BARRIER",
+ "SRCU_SIZE_WAIT_CALL",
+ "SRCU_SIZE_WAIT_CBS1",
+ "SRCU_SIZE_WAIT_CBS2",
+ "SRCU_SIZE_WAIT_CBS3",
+ "SRCU_SIZE_WAIT_CBS4",
+ "SRCU_SIZE_BIG",
+ "SRCU_SIZE_???",
+};
+
void srcu_torture_stats_print(struct srcu_struct *ssp, char *tt, char *tf)
{
int cpu;
int idx;
unsigned long s0 = 0, s1 = 0;
+ int ss_state = READ_ONCE(ssp->srcu_size_state);
+ int ss_state_idx = ss_state;
idx = ssp->srcu_idx & 0x1;
- pr_alert("%s%s Tree SRCU g%ld per-CPU(idx=%d):",
- tt, tf, rcu_seq_current(&ssp->srcu_gp_seq), idx);
+ if (ss_state < 0 || ss_state >= ARRAY_SIZE(srcu_size_state_name))
+ ss_state_idx = ARRAY_SIZE(srcu_size_state_name) - 1;
+ pr_alert("%s%s Tree SRCU g%ld state %d (%s) per-CPU(idx=%d):",
+ tt, tf, rcu_seq_current(&ssp->srcu_gp_seq), ss_state,
+ srcu_size_state_name[ss_state_idx], idx);
for_each_possible_cpu(cpu) {
unsigned long l0, l1;
unsigned long u0, u1;
--
2.31.1.189.g2e36527f23
