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| author |   Paul E. McKenney <paulmck@linux.ibm.com> | 2019-06-01 05:12:36 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-08-13 14:32:39 -0700 |
| commit | 18cd8c93e69e3853eb408980089fb3c58813f922 (patch) | |
| tree | 4e40fe7ef9bef56f8857a607313f27fccf4a0c14 /kernel/rcu | |
| parent | rcu/nocb: Rename rcu_nocb_leader_stride kernel boot parameter (diff) | |
| download | linux-dev-18cd8c93e69e3853eb408980089fb3c58813f922.tar.xz linux-dev-18cd8c93e69e3853eb408980089fb3c58813f922.zip | |
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: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 6 |
1 files changed, 6 insertions, 0 deletions
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; } |