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| author | Paul E. McKenney <paulmck@kernel.org> | 2021-04-02 21:51:50 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-05-10 16:22:54 -0700 |
| commit | e44111ed20d8b2d7b05b20d694358ae77d4e93e2 (patch) | |
| tree | 8ea98e197ddff7bb2587cb2bd6ab5dc248431261 /kernel/rcu | |
| parent | 8e4b1d2bc198e34b48fc7cc3a3c5a2fcb269e271 (diff) | |
rcu: Add ->rt_priority and ->gp_start to show_rcu_gp_kthreads() output
This commit adds ->rt_priority and ->gp_start to show_rcu_gp_kthreads()
output in order to better diagnose RCU priority boosting failures.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree_stall.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h index 59b95cc5cbdf..fb4702570316 100644 --- a/kernel/rcu/tree_stall.h +++ b/kernel/rcu/tree_stall.h @@ -726,6 +726,7 @@ void show_rcu_gp_kthreads(void) unsigned long j; unsigned long ja; unsigned long jr; + unsigned long js; unsigned long jw; struct rcu_data *rdp; struct rcu_node *rnp; @@ -734,11 +735,12 @@ void show_rcu_gp_kthreads(void) j = jiffies; ja = j - data_race(rcu_state.gp_activity); jr = j - data_race(rcu_state.gp_req_activity); + js = j - data_race(rcu_state.gp_start); jw = j - data_race(rcu_state.gp_wake_time); - pr_info("%s: wait state: %s(%d) ->state: %#lx delta ->gp_activity %lu ->gp_req_activity %lu ->gp_wake_time %lu ->gp_wake_seq %ld ->gp_seq %ld ->gp_seq_needed %ld ->gp_flags %#x\n", + pr_info("%s: wait state: %s(%d) ->state: %#lx ->rt_priority %u delta ->gp_start %lu ->gp_activity %lu ->gp_req_activity %lu ->gp_wake_time %lu ->gp_wake_seq %ld ->gp_seq %ld ->gp_seq_needed %ld ->gp_flags %#x\n", rcu_state.name, gp_state_getname(rcu_state.gp_state), - rcu_state.gp_state, t ? t->state : 0x1ffffL, - ja, jr, jw, (long)data_race(rcu_state.gp_wake_seq), + rcu_state.gp_state, t ? t->state : 0x1ffffL, t ? t->rt_priority : 0xffU, + js, ja, jr, jw, (long)data_race(rcu_state.gp_wake_seq), (long)data_race(rcu_state.gp_seq), (long)data_race(rcu_get_root()->gp_seq_needed), data_race(rcu_state.gp_flags)); |