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tracing: expand the ring buffers when an event is activated

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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>
This commit is contained in:
Steven Rostedt 2009-03-11 14:33:00 -04:00
parent 73c5162aa3
commit 1852fcce18
3 changed files with 31 additions and 0 deletions
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3
kernel/trace/trace.h
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@ -737,6 +737,9 @@ static inline void trace_branch_disable(void)
}
#endif /* CONFIG_BRANCH_TRACER */
/* set ring buffers to default size if not already done so */
int tracing_update_buffers(void);
/* trace event type bit fields, not numeric */
enum {
TRACE_EVENT_TYPE_PRINTF = 1,