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refscale: Warn on individual ref_scale_init() error conditions 

When running refscale as a module, any ref_scale_init() issues will be
reflected in the error code from modprobe or insmod, as the case may be.
However, these error codes are not available when running refscale
built-in, for example, when using the kvm.sh script.  This commit
therefore adds WARN_ON_ONCE() to allow distinguishing ref_scale_init()
errors when running refscale built-in.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-08-05 15:57:12 -07:00
parent b3b3cc618e
commit ed60ad733a
1 changed files with 3 additions and 3 deletions
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6
kernel/rcu/refscale.c
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@ -824,7 +824,7 @@ ref_scale_init(void)
init_waitqueue_head(&shutdown_wq);
firsterr = torture_create_kthread(ref_scale_shutdown, NULL,
shutdown_task);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
schedule_timeout_uninterruptible(1);
}
@ -851,7 +851,7 @@ ref_scale_init(void)
for (i = 0; i < nreaders; i++) {
firsterr = torture_create_kthread(ref_scale_reader, (void *)i,
reader_tasks[i].task);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
init_waitqueue_head(&(reader_tasks[i].wq));
@ -860,7 +860,7 @@ ref_scale_init(void)
// Main Task
init_waitqueue_head(&main_wq);
firsterr = torture_create_kthread(main_func, NULL, main_task);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
torture_init_end();