diff options
Diffstat (limited to 'kernel/trace/trace_hwlat.c')
| -rw-r--r-- | kernel/trace/trace_hwlat.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c index 862f4b0139fc..63526670605a 100644 --- a/kernel/trace/trace_hwlat.c +++ b/kernel/trace/trace_hwlat.c @@ -237,6 +237,7 @@ static int get_sample(void) /* If we exceed the threshold value, we have found a hardware latency */ if (sample > thresh || outer_sample > thresh) { struct hwlat_sample s; + u64 latency; ret = 1; @@ -253,11 +254,13 @@ static int get_sample(void) s.nmi_count = nmi_count; trace_hwlat_sample(&s); + latency = max(sample, outer_sample); + /* Keep a running maximum ever recorded hardware latency */ - if (sample > tr->max_latency) - tr->max_latency = sample; - if (outer_sample > tr->max_latency) - tr->max_latency = outer_sample; + if (latency > tr->max_latency) { + tr->max_latency = latency; + latency_fsnotify(tr); + } } out: |