tracing: expand the ring buffers when an event is activated
To save memory, the tracer ring buffers are set to a minimum.
The activating of a trace expands the ring buffer size. This patch
adds this expanding, when an event is activated.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 769dfd0..ca624df 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -141,6 +141,10 @@
if (!cnt || cnt < 0)
return 0;
+ ret = tracing_update_buffers();
+ if (ret < 0)
+ return ret;
+
ret = get_user(ch, ubuf++);
if (ret)
return ret;
@@ -331,6 +335,10 @@
if (ret < 0)
return ret;
+ ret = tracing_update_buffers();
+ if (ret < 0)
+ return ret;
+
switch (val) {
case 0:
case 1: