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.
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| @@ -758,7 +758,7 @@ kfree_scale_init(void) · 757 unmodified lines | |||
| 758 | init_waitqueue_head(&shutdown_wq); | 758 | init_waitqueue_head(&shutdown_wq); |
| 759 | firsterr = torture_create_kthread(kfree_scale_shutdown, NULL, | 759 | firsterr = torture_create_kthread(kfree_scale_shutdown, NULL, |
| 760 | shutdown_task); | 760 | shutdown_task); |
| 761 | if (firsterr) | 761 | if (torture_init_error(firsterr)) |
| 762 | goto unwind; | 762 | goto unwind; |
| 763 | schedule_timeout_uninterruptible(1); | 763 | schedule_timeout_uninterruptible(1); |
| 764 | } | 764 | } |
| @@ -775,7 +775,7 @@ kfree_scale_init(void) · 10 unmodified lines | |||
| 775 | for (i = 0; i < kfree_nrealthreads; i++) { | 775 | for (i = 0; i < kfree_nrealthreads; i++) { |
| 776 | firsterr = torture_create_kthread(kfree_scale_thread, (void *)i, | 776 | firsterr = torture_create_kthread(kfree_scale_thread, (void *)i, |
| 777 | kfree_reader_tasks[i]); | 777 | kfree_reader_tasks[i]); |
| 778 | if (firsterr) | 778 | if (torture_init_error(firsterr)) |
| 779 | goto unwind; | 779 | goto unwind; |
| 780 | } | 780 | } |
| 781 | 781 | ||
| @@ -838,7 +838,7 @@ rcu_scale_init(void) · 56 unmodified lines | |||
| 838 | init_waitqueue_head(&shutdown_wq); | 838 | init_waitqueue_head(&shutdown_wq); |
| 839 | firsterr = torture_create_kthread(rcu_scale_shutdown, NULL, | 839 | firsterr = torture_create_kthread(rcu_scale_shutdown, NULL, |
| 840 | shutdown_task); | 840 | shutdown_task); |
| 841 | if (firsterr) | 841 | if (torture_init_error(firsterr)) |
| 842 | goto unwind; | 842 | goto unwind; |
| 843 | schedule_timeout_uninterruptible(1); | 843 | schedule_timeout_uninterruptible(1); |
| 844 | } | 844 | } |
| @@ -852,7 +852,7 @@ rcu_scale_init(void) · 7 unmodified lines | |||
| 852 | for (i = 0; i < nrealreaders; i++) { | 852 | for (i = 0; i < nrealreaders; i++) { |
| 853 | firsterr = torture_create_kthread(rcu_scale_reader, (void *)i, | 853 | firsterr = torture_create_kthread(rcu_scale_reader, (void *)i, |
| 854 | reader_tasks[i]); | 854 | reader_tasks[i]); |
| 855 | if (firsterr) | 855 | if (torture_init_error(firsterr)) |
| 856 | goto unwind; | 856 | goto unwind; |
| 857 | } | 857 | } |
| 858 | while (atomic_read(&n_rcu_scale_reader_started) < nrealreaders) | 858 | while (atomic_read(&n_rcu_scale_reader_started) < nrealreaders) |
| @@ -879,7 +879,7 @@ rcu_scale_init(void) · 20 unmodified lines | |||
| 879 | } | 879 | } |
| 880 | firsterr = torture_create_kthread(rcu_scale_writer, (void *)i, | 880 | firsterr = torture_create_kthread(rcu_scale_writer, (void *)i, |
| 881 | writer_tasks[i]); | 881 | writer_tasks[i]); |
| 882 | if (firsterr) | 882 | if (torture_init_error(firsterr)) |
| 883 | goto unwind; | 883 | goto unwind; |
| 884 | } | 884 | } |
| 885 | torture_init_end(); | 885 | torture_init_end(); |