From: "Paul E. McKenney" paulmck@kernel.org
[ Upstream commit bc80d353b3f565138cda7e95ed4020e6e69360b2 ]
If an refscale torture-test run is given a bad kvm.sh argument, the test will complain to the console, which is good. What is bad is that from the user's perspective, it will just hang for the time specified by the --duration argument. This commit therefore forces an immediate kernel shutdown if a ref_scale_init()-time error occurs, thus avoiding the appearance of a hang. It also forces a console splat in this case to clearly indicate the presence of an error.
Signed-off-by: Paul E. McKenney paulmck@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/rcu/refscale.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c index 952595c678b37..8aa886684b067 100644 --- a/kernel/rcu/refscale.c +++ b/kernel/rcu/refscale.c @@ -658,7 +658,6 @@ ref_scale_init(void) for (i = 0; i < ARRAY_SIZE(scale_ops); i++) pr_cont(" %s", scale_ops[i]->name); pr_cont("\n"); - WARN_ON(!IS_MODULE(CONFIG_RCU_REF_SCALE_TEST)); firsterr = -EINVAL; cur_ops = NULL; goto unwind; @@ -712,6 +711,10 @@ ref_scale_init(void) unwind: torture_init_end(); ref_scale_cleanup(); + if (shutdown) { + WARN_ON(!IS_MODULE(CONFIG_RCU_REF_SCALE_TEST)); + kernel_power_off(); + } return firsterr; }