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refscale: Prevent hangs for invalid arguments 

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>
zero-sugar-mainline-defconfig
Paul E. McKenney 2020-09-17 10:37:10 -07:00
parent 2f2214d43c
commit bc80d353b3
1 changed files with 4 additions and 1 deletions
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5
kernel/rcu/refscale.c
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@ -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;
@ -718,6 +717,10 @@ 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;
}