提交 77d9f465 编写于 作者: S Steven Rostedt 提交者: Ingo Molnar

tracing/filters: use ring_buffer_discard_commit for discarded events

The ring_buffer_discard_commit makes better usage of the ring_buffer
when an event has been discarded. It tries to remove it completely if
possible.

This patch converts the trace event filtering to use
ring_buffer_discard_commit instead of the ring_buffer_event_discard.
Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 fa1b47dd
......@@ -884,13 +884,18 @@ trace_current_buffer_lock_reserve(unsigned char type, unsigned long len,
void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc)
{
return __trace_buffer_unlock_commit(&global_trace, event, flags, pc, 1);
__trace_buffer_unlock_commit(&global_trace, event, flags, pc, 1);
}
void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc)
{
return __trace_buffer_unlock_commit(&global_trace, event, flags, pc, 0);
__trace_buffer_unlock_commit(&global_trace, event, flags, pc, 0);
}
void trace_current_buffer_discard_commit(struct ring_buffer_event *event)
{
ring_buffer_discard_commit(global_trace.buffer, event);
}
void
......
......@@ -497,6 +497,7 @@ void trace_current_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc);
void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event,
unsigned long flags, int pc);
void trace_current_buffer_discard_commit(struct ring_buffer_event *event);
struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
struct trace_array_cpu *data);
......
......@@ -223,8 +223,8 @@ static void ftrace_raw_event_##call(proto) \
assign; \
\
if (call->preds && !filter_match_preds(call, entry)) \
ring_buffer_event_discard(event); \
\
trace_current_buffer_discard_commit(event); \
else \
trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
\
} \
......
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