Commit 18cd8c93 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu/nocb: Print gp/cb kthread hierarchy if dump_tree 



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: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
parent f7c612b0

kernel/rcu/tree_plugin.h

+6 −0
Original line number Diff line number Diff line
@@ -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;

	}