summaryrefslogtreecommitdiffstats
path: root/kernel/trace/ring_buffer.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/trace/ring_buffer.c')
-rw-r--r--kernel/trace/ring_buffer.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 51633d74a21e..da2c59d8f486 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1170,6 +1170,7 @@ ring_buffer_free(struct ring_buffer *buffer)
put_online_cpus();
+ kfree(buffer->buffers);
free_cpumask_var(buffer->cpumask);
kfree(buffer);
@@ -2379,7 +2380,7 @@ void ring_buffer_discard_commit(struct ring_buffer *buffer,
*/
RB_WARN_ON(buffer, !local_read(&cpu_buffer->committing));
- if (!rb_try_to_discard(cpu_buffer, event))
+ if (rb_try_to_discard(cpu_buffer, event))
goto out;
/*
@@ -2990,7 +2991,6 @@ rb_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
* the box. Return the padding, and we will release
* the current locks, and try again.
*/
- rb_advance_reader(cpu_buffer);
return event;
case RINGBUF_TYPE_TIME_EXTEND:
@@ -3093,7 +3093,7 @@ static inline int rb_ok_to_lock(void)
* buffer too. A one time deal is all you get from reading
* the ring buffer from an NMI.
*/
- if (likely(!in_nmi() && !oops_in_progress))
+ if (likely(!in_nmi()))
return 1;
tracing_off_permanent();
@@ -3126,6 +3126,8 @@ ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
if (dolock)
spin_lock(&cpu_buffer->reader_lock);
event = rb_buffer_peek(buffer, cpu, ts);
+ if (event && event->type_len == RINGBUF_TYPE_PADDING)
+ rb_advance_reader(cpu_buffer);
if (dolock)
spin_unlock(&cpu_buffer->reader_lock);
local_irq_restore(flags);
@@ -3197,12 +3199,9 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
spin_lock(&cpu_buffer->reader_lock);
event = rb_buffer_peek(buffer, cpu, ts);
- if (!event)
- goto out_unlock;
-
- rb_advance_reader(cpu_buffer);
+ if (event)
+ rb_advance_reader(cpu_buffer);
- out_unlock:
if (dolock)
spin_unlock(&cpu_buffer->reader_lock);
local_irq_restore(flags);