This commit causes the no-CBs grace-period/callback hierarchy to be
printed to the console when the dump_tree kernel boot parameter is set.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
---
kernel/rcu/tree_plugin.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 80b27a9f306d..0a3f8680b450 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2135,6 +2135,7 @@ module_param(rcu_nocb_gp_stride, int, 0444);
static void __init rcu_organize_nocb_kthreads(void)
{
int cpu;
+ bool firsttime = true;
int ls = rcu_nocb_gp_stride;
int nl = 0; /* Next GP kthread. */
struct rcu_data *rdp;
@@ -2160,10 +2161,15 @@ static void __init rcu_organize_nocb_kthreads(void)
nl = DIV_ROUND_UP(rdp->cpu + 1, ls) * ls;
rdp->nocb_gp_rdp = rdp;
rdp_gp = rdp;
+ if (!firsttime && dump_tree)
+ pr_cont("\n");
+ firsttime = false;
+ pr_alert("%s: No-CB GP kthread CPU %d:", __func__, cpu);
} else {
/* Another CB kthread, link to previous GP kthread. */
rdp->nocb_gp_rdp = rdp_gp;
rdp_prev->nocb_next_cb_rdp = rdp;
+ pr_alert(" %d", cpu);
}
rdp_prev = rdp;
}
--
2.17.1
