The warning is not indicative of an actual problem, especially when
triggered by nmi_watchdog, so lower it to KERN_INFO. While I'm at
it, clarify the message and reference the sysctl that controls it.
Signed-off-by: Andy Lutomirski <l...@amacapital.net>
---
kernel/events/core.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 56003c6..245bdc0 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -263,9 +263,8 @@ void perf_sample_event_took(u64 sample_len_ns)
sysctl_perf_event_sample_rate = max_samples_per_tick * HZ;
perf_sample_period_ns = NSEC_PER_SEC / sysctl_perf_event_sample_rate;
- printk_ratelimited(KERN_WARNING
- "perf samples too long (%lld > %lld), lowering "
- "kernel.perf_event_max_sample_rate to %d\n",
+ printk_ratelimited(KERN_INFO
+ "perf samples are too slow for
kernel.perf_cpu_time_max_percent (%lldns > %lldns); lowering
kernel.perf_event_max_sample_rate to %d\n",
avg_local_sample_len, allowed_ns,
sysctl_perf_event_sample_rate);
--
1.8.5.3
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