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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: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2022-01-24 17:05:51 -08:00
parent e2f638365d
commit 3bedebcf63
1 changed files with 20 additions and 2 deletions
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22
kernel/rcu/srcutree.c
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@ -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;