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ring-buffer: add tracing_off_permanent

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Impact: feature to permanently disable ring buffer

This patch adds a API to the ring buffer code that will permanently
disable the ring buffer from ever recording. This should only be
called when some serious anomaly is detected, and the system
may be in an unstable state. When that happens, shutting down the
recording to the ring buffers may be appropriate.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2008-11-21 12:41:55 -05:00 • committed by Ingo Molnar
parent a0a70c735e
commit 033601a32b
2 changed files with 67 additions and 13 deletions
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1
include/linux/ring_buffer.h
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@ -122,6 +122,7 @@ void ring_buffer_normalize_time_stamp(int cpu, u64 *ts);
void tracing_on(void);
void tracing_off(void);
void tracing_off_permanent(void);
enum ring_buffer_flags {
RB_FL_OVERWRITE = 1 << 0,