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rcutorture: Make rcutorture support print rcu-tasks gp state

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This commit make rcu-tasks related rcutorture test support rcu-tasks
gp state printing when the writer stall occurs or the at the end of
rcutorture test, and generate rcu_ops->get_gp_data() operation to
simplify the acquisition of gp state for different types of rcutorture
tests.

Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
This commit is contained in:
Zqiang
2024-03-18 17:34:11 +08:00
committed by Uladzislau Rezki (Sony)
parent e38bf06d50
commit dddcddef14
5 changed files with 53 additions and 32 deletions
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kernel/rcu/tree.c
+3 -10
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@@ -508,17 +508,10 @@ static struct rcu_node *rcu_get_root(void)
/*
* Send along grace-period-related data for rcutorture diagnostics.
*/
void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
unsigned long *gp_seq)
void rcutorture_get_gp_data(int *flags, unsigned long *gp_seq)
{
switch (test_type) {
case RCU_FLAVOR:
*flags = READ_ONCE(rcu_state.gp_flags);
*gp_seq = rcu_seq_current(&rcu_state.gp_seq);
break;
default:
break;
}
*flags = READ_ONCE(rcu_state.gp_flags);
*gp_seq = rcu_seq_current(&rcu_state.gp_seq);
}
EXPORT_SYMBOL_GPL(rcutorture_get_gp_data);