diff options
| -rw-r--r-- | kernel/nmi_watchdog.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/nmi_watchdog.c b/kernel/nmi_watchdog.c index 73c1954a97bb..4f23505d887d 100644 --- a/kernel/nmi_watchdog.c +++ b/kernel/nmi_watchdog.c | |||
| @@ -166,8 +166,12 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) | |||
| 166 | wd_attr.sample_period = hw_nmi_get_sample_period(); | 166 | wd_attr.sample_period = hw_nmi_get_sample_period(); |
| 167 | event = perf_event_create_kernel_counter(&wd_attr, hotcpu, -1, wd_overflow); | 167 | event = perf_event_create_kernel_counter(&wd_attr, hotcpu, -1, wd_overflow); |
| 168 | if (IS_ERR(event)) { | 168 | if (IS_ERR(event)) { |
| 169 | printk(KERN_ERR "nmi watchdog failed to create perf event on %i: %p\n", hotcpu, event); | 169 | wd_attr.type = PERF_TYPE_SOFTWARE; |
| 170 | return NOTIFY_BAD; | 170 | event = perf_event_create_kernel_counter(&wd_attr, hotcpu, -1, wd_overflow); |
| 171 | if (IS_ERR(event)) { | ||
| 172 | printk(KERN_ERR "nmi watchdog failed to create perf event on %i: %p\n", hotcpu, event); | ||
| 173 | return NOTIFY_BAD; | ||
| 174 | } | ||
| 171 | } | 175 | } |
| 172 | per_cpu(nmi_watchdog_ev, hotcpu) = event; | 176 | per_cpu(nmi_watchdog_ev, hotcpu) = event; |
| 173 | perf_event_enable(per_cpu(nmi_watchdog_ev, hotcpu)); | 177 | perf_event_enable(per_cpu(nmi_watchdog_ev, hotcpu)); |
