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rcuscale: Warn on individual rcu_scale_init() error conditions 

When running rcuscale as a module, any rcu_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 rcuscale
built-in, for example, when using the kvm.sh script.  This commit
therefore adds WARN_ON_ONCE() to allow distinguishing rcu_scale_init()
errors when running rcuscale built-in.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-08-05 15:58:53 -07:00
parent ed60ad733a
commit eb77abfdee
1 changed files with 5 additions and 5 deletions
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10
kernel/rcu/rcuscale.c
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@ -758,7 +758,7 @@ kfree_scale_init(void)
init_waitqueue_head(&shutdown_wq);
firsterr = torture_create_kthread(kfree_scale_shutdown, NULL,
shutdown_task);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
schedule_timeout_uninterruptible(1);
}
@ -775,7 +775,7 @@ kfree_scale_init(void)
for (i = 0; i < kfree_nrealthreads; i++) {
firsterr = torture_create_kthread(kfree_scale_thread, (void *)i,
kfree_reader_tasks[i]);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
}
@ -838,7 +838,7 @@ rcu_scale_init(void)
init_waitqueue_head(&shutdown_wq);
firsterr = torture_create_kthread(rcu_scale_shutdown, NULL,
shutdown_task);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
schedule_timeout_uninterruptible(1);
}
@ -852,7 +852,7 @@ rcu_scale_init(void)
for (i = 0; i < nrealreaders; i++) {
firsterr = torture_create_kthread(rcu_scale_reader, (void *)i,
reader_tasks[i]);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
}
while (atomic_read(&n_rcu_scale_reader_started) < nrealreaders)
@ -879,7 +879,7 @@ rcu_scale_init(void)
}
firsterr = torture_create_kthread(rcu_scale_writer, (void *)i,
writer_tasks[i]);
if (firsterr)
if (torture_init_error(firsterr))
goto unwind;
}
torture_init_end();