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| author | Paul E. McKenney <paulmck@kernel.org> | 2019-12-05 15:53:28 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-02-20 16:03:30 -0800 |
| commit | 4ab00bdd99a906c089b5c20ee7b5cb91e7c61123 (patch) | |
| tree | 716f2dc3d815a6bed33441d4d14c3b06823a229d /kernel/rcu | |
| parent | 58c53360b36d2077cbb843e7ad2bf75f0498271c (diff) | |
| download | linux-4ab00bdd99a906c089b5c20ee7b5cb91e7c61123.tar.bz2 | |
rcutorture: Suppress boottime bad-sequence warnings
In normal production, an excessively long wait on a grace period
(synchronize_rcu(), for example) at boottime is often just as bad
as at any other time. In fact, given the desire for fast boot, any
sort of long wait at boot is a bad idea. However, heavy rcutorture
testing on large hyperthreaded systems can generate such long waits
during boot as a matter of course. This commit therefore causes
the rcupdate.rcu_cpu_stall_suppress_at_boot kernel boot parameter to
suppress reporting of bootime bad-sequence warning due to excessively
long grace-period waits.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -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 16c84ec182bd..5efd9503df56 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1423,7 +1423,8 @@ rcu_torture_stats_print(void) pr_alert("%s%s ", torture_type, TORTURE_FLAG); pr_cont("rtc: %p %s: %lu tfle: %d rta: %d rtaf: %d rtf: %d ", rcu_torture_current, - rcu_torture_current ? "ver" : "VER", + rcu_torture_current && !rcu_stall_is_suppressed_at_boot() + ? "ver" : "VER", rcu_torture_current_version, list_empty(&rcu_torture_freelist), atomic_read(&n_rcu_torture_alloc), |