Commit 3bedebcf authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

srcu: Make rcutorture dump the SRCU size state 



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: default avatarNeeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: default avatarNeeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent e2f63836

kernel/rcu/srcutree.c

+20 −2
Original line number Diff line number Diff line
@@ -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;