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| author | Anna-Maria Behnsen <anna-maria@linutronix.de> | 2022-04-11 17:19:03 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-06-21 15:55:02 -0700 |
| commit | 14c0017c19ead104511dbcf6a59b83b2456d09af (patch) | |
| tree | 0328213c34709ec8df723cb771b23cccb27cbc4c /kernel | |
| parent | ab69d3c8b99435ebd2ac4a241a5d931024c83c02 (diff) | |
| download | linux-14c0017c19ead104511dbcf6a59b83b2456d09af.tar.bz2 | |
rcu/torture: Change order of warning and trace dump
Dumping a big ftrace buffer could lead to a RCU stall. So there is the
ftrace buffer and the stall information which needs to be printed. When
there is additionally a WARN_ON() which describes the reason for the ftrace
buffer dump and the WARN_ON() is executed _after_ ftrace buffer dump, the
information get lost in the middle of the RCU stall information.
Therefore print WARN_ON() message before dumping the ftrace buffer in
rcu_torture_writer().
[ paulmck: Add tracing_off() to avoid cruft from WARN(). ]
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Reviewed-by: Benedikt Spranger <b.spranger@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 7120165a9342..3032dd7c7ad3 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1321,8 +1321,9 @@ rcu_torture_writer(void *arg) if (list_empty(&rcu_tortures[i].rtort_free) && rcu_access_pointer(rcu_torture_current) != &rcu_tortures[i]) { - rcu_ftrace_dump(DUMP_ALL); + tracing_off(); WARN(1, "%s: rtort_pipe_count: %d\n", __func__, rcu_tortures[i].rtort_pipe_count); + rcu_ftrace_dump(DUMP_ALL); } if (stutter_waited) sched_set_normal(current, oldnice); |