diff options
| author |   Paul E. McKenney <paulmck@linux.ibm.com> | 2018-10-02 11:24:08 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-12 09:03:59 -0800 |
| commit | 691960197e8daa39bf89886ba2e39de1e33f1ce4 (patch) | |
| tree | fe9bb6ee58a02dd34bec8224a8dd83802dced474 /kernel/rcu | |
| parent | rcu: Parameterize rcu_check_gp_start_stall() (diff) | |
| download | linux-dev-691960197e8daa39bf89886ba2e39de1e33f1ce4.tar.xz linux-dev-691960197e8daa39bf89886ba2e39de1e33f1ce4.zip | |
rcu: Add state name to show_rcu_gp_kthreads() output
This commit adds the name of the RCU grace-period state to
the show_rcu_gp_kthreads() output in order to ease debugging.
This commit also moves gp_state_getname() up in the code so that
show_rcu_gp_kthreads() can use it.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 36e30150e1e9..ea78532183ac 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -500,6 +500,16 @@ void rcu_force_quiescent_state(void) EXPORT_SYMBOL_GPL(rcu_force_quiescent_state); /* + * Convert a ->gp_state value to a character string. + */ +static const char *gp_state_getname(short gs) +{ + if (gs < 0 || gs >= ARRAY_SIZE(gp_state_names)) + return "???"; + return gp_state_names[gs]; +} + +/* * Show the state of the grace-period kthreads. */ void show_rcu_gp_kthreads(void) @@ -508,8 +518,9 @@ void show_rcu_gp_kthreads(void) struct rcu_data *rdp; struct rcu_node *rnp; - pr_info("%s: wait state: %d ->state: %#lx\n", rcu_state.name, - rcu_state.gp_state, rcu_state.gp_kthread->state); + pr_info("%s: wait state: %s(%d) ->state: %#lx\n", rcu_state.name, + gp_state_getname(rcu_state.gp_state), rcu_state.gp_state, + rcu_state.gp_kthread->state); rcu_for_each_node_breadth_first(rnp) { if (ULONG_CMP_GE(rcu_state.gp_seq, rnp->gp_seq_needed)) continue; @@ -1143,16 +1154,6 @@ static void record_gp_stall_check_time(void) } /* - * Convert a ->gp_state value to a character string. - */ -static const char *gp_state_getname(short gs) -{ - if (gs < 0 || gs >= ARRAY_SIZE(gp_state_names)) - return "???"; - return gp_state_names[gs]; -} - -/* * Complain about starvation of grace-period kthread. */ static void rcu_check_gp_kthread_starvation(void) |