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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-10-09 16:42:37 -0700 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-12-14 16:38:23 +0100 |
| commit | 0203b485d26d5b403ff4ed21e4cc85ba9ec0fe67 (patch) | |
| tree | 41a9c48c1e073a4370f998f0d78daf175706c67f /kernel/rcu | |
| parent | fac04efc5c793dccbd07e2d59af9f90b7fc0dca4 (diff) | |
| download | lwn-0203b485d26d5b403ff4ed21e4cc85ba9ec0fe67.tar.gz lwn-0203b485d26d5b403ff4ed21e4cc85ba9ec0fe67.zip | |
torture: Add dowarn argument to torture_sched_setaffinity()
Current use cases of torture_sched_setaffinity() are well served by its
unconditional warning on error. However, an upcoming use case for a
preemption kthread needs to avoid warnings that might otherwise arise
when that kthread attempted to bind itself to a CPU on its way offline.
This commit therefore adds a dowarn argument that, when false, suppresses
the warning.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 2 | ||||
| -rw-r--r-- | kernel/rcu/update.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 612d27690335..908506b68c41 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -857,7 +857,7 @@ static void synchronize_rcu_trivial(void) int cpu; for_each_online_cpu(cpu) { - torture_sched_setaffinity(current->pid, cpumask_of(cpu)); + torture_sched_setaffinity(current->pid, cpumask_of(cpu), true); WARN_ON_ONCE(raw_smp_processor_id() != cpu); } } diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index f8436969e0c8..c912b594ba98 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -527,12 +527,12 @@ EXPORT_SYMBOL_GPL(do_trace_rcu_torture_read); #if IS_ENABLED(CONFIG_RCU_TORTURE_TEST) || IS_MODULE(CONFIG_RCU_TORTURE_TEST) || IS_ENABLED(CONFIG_LOCK_TORTURE_TEST) || IS_MODULE(CONFIG_LOCK_TORTURE_TEST) /* Get rcutorture access to sched_setaffinity(). */ -long torture_sched_setaffinity(pid_t pid, const struct cpumask *in_mask) +long torture_sched_setaffinity(pid_t pid, const struct cpumask *in_mask, bool dowarn) { int ret; ret = sched_setaffinity(pid, in_mask); - WARN_ONCE(ret, "%s: sched_setaffinity(%d) returned %d\n", __func__, pid, ret); + WARN_ONCE(dowarn && ret, "%s: sched_setaffinity(%d) returned %d\n", __func__, pid, ret); return ret; } EXPORT_SYMBOL_GPL(torture_sched_setaffinity); |