1 files changed, 24 insertions, 21 deletions

diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index 8d68e149a8b3..573d3cc762c3 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -102,8 +102,10 @@ static enum event_status read_page(int cpu)
                         event = (void *)&rpage->data[i];
                         switch (event->type_len) {
                         case RINGBUF_TYPE_PADDING:
-                                /* We don't expect any padding */
-                                KILL_TEST();
+                                /* failed writes may be discarded events */
+                                if (!event->time_delta)
+                                        KILL_TEST();
+                                inc = event->array[0] + 4;
                                 break;
                         case RINGBUF_TYPE_TIME_EXTEND:
                                 inc = 8;
@@ -119,7 +121,7 @@ static enum event_status read_page(int cpu)
                                         KILL_TEST();
                                         break;
                                 }
-                                inc = event->array[0];
+                                inc = event->array[0] + 4;
                                 break;
                         default:
                                 entry = ring_buffer_event_data(event);
@@ -201,7 +203,7 @@ static void ring_buffer_producer(void)
          * Hammer the buffer for 10 secs (this may
          * make the system stall)
          */
-        pr_info("Starting ring buffer hammer\n");
+        trace_printk("Starting ring buffer hammer\n");
         do_gettimeofday(&start_tv);
         do {
                 struct ring_buffer_event *event;
@@ -237,7 +239,7 @@ static void ring_buffer_producer(void)
 #endif
 
         } while (end_tv.tv_sec < (start_tv.tv_sec + RUN_TIME) && !kill_test);
-        pr_info("End ring buffer hammer\n");
+        trace_printk("End ring buffer hammer\n");
 
         if (consumer) {
                 /* Init both completions here to avoid races */
@@ -260,49 +262,50 @@ static void ring_buffer_producer(void)
         overruns = ring_buffer_overruns(buffer);
 
         if (kill_test)
-                pr_info("ERROR!\n");
-        pr_info("Time:     %lld (usecs)\n", time);
-        pr_info("Overruns: %lld\n", overruns);
+                trace_printk("ERROR!\n");
+        trace_printk("Time:     %lld (usecs)\n", time);
+        trace_printk("Overruns: %lld\n", overruns);
         if (disable_reader)
-                pr_info("Read:     (reader disabled)\n");
+                trace_printk("Read:     (reader disabled)\n");
         else
-                pr_info("Read:     %ld  (by %s)\n", read,
+                trace_printk("Read:     %ld  (by %s)\n", read,
                         read_events ? "events" : "pages");
-        pr_info("Entries:  %lld\n", entries);
-        pr_info("Total:    %lld\n", entries + overruns + read);
-        pr_info("Missed:   %ld\n", missed);
-        pr_info("Hit:      %ld\n", hit);
+        trace_printk("Entries:  %lld\n", entries);
+        trace_printk("Total:    %lld\n", entries + overruns + read);
+        trace_printk("Missed:   %ld\n", missed);
+        trace_printk("Hit:      %ld\n", hit);
 
         /* Convert time from usecs to millisecs */
         do_div(time, USEC_PER_MSEC);
         if (time)
                 hit /= (long)time;
         else
-                pr_info("TIME IS ZERO??\n");
+                trace_printk("TIME IS ZERO??\n");
 
-        pr_info("Entries per millisec: %ld\n", hit);
+        trace_printk("Entries per millisec: %ld\n", hit);
 
         if (hit) {
                 /* Calculate the average time in nanosecs */
                 avg = NSEC_PER_MSEC / hit;
-                pr_info("%ld ns per entry\n", avg);
+                trace_printk("%ld ns per entry\n", avg);
         }
 
         if (missed) {
                 if (time)
                         missed /= (long)time;
 
-                pr_info("Total iterations per millisec: %ld\n", hit + missed);
+                trace_printk("Total iterations per millisec: %ld\n",
+                             hit + missed);
 
                 /* it is possible that hit + missed will overflow and be zero */
                 if (!(hit + missed)) {
-                        pr_info("hit + missed overflowed and totalled zero!\n");
+                        trace_printk("hit + missed overflowed and totalled zero!\n");
                         hit--; /* make it non zero */
                 }
 
                 /* Caculate the average time in nanosecs */
                 avg = NSEC_PER_MSEC / (hit + missed);
-                pr_info("%ld ns per entry\n", avg);
+                trace_printk("%ld ns per entry\n", avg);
         }
 }
 
@@ -353,7 +356,7 @@ static int ring_buffer_producer_thread(void *arg)
 
                 ring_buffer_producer();
 
-                pr_info("Sleeping for 10 secs\n");
+                trace_printk("Sleeping for 10 secs\n");
                 set_current_state(TASK_INTERRUPTIBLE);
                 schedule_timeout(HZ * SLEEP_TIME);
                 __set_current_state(TASK_RUNNING);