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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2013-03-14 14:20:54 -0400
committerSteven Rostedt <rostedt@goodmis.org>2013-03-14 23:40:15 -0400
commit80902822658aab18330569587cdb69ac1dfdcea8 (patch)
tree552d06bf6a7dfcc6c392d7103cfc84e725545c75 /kernel
parent69d34da2984c95b33ea21518227e1f9470f11d95 (diff)
tracing: Keep overwrite in sync between regular and snapshot buffers
Changing the overwrite mode for the ring buffer via the trace option only sets the normal buffer. But the snapshot buffer could swap with it, and then the snapshot would be in non overwrite mode and the normal buffer would be in overwrite mode, even though the option flag states otherwise. Keep the two buffers overwrite modes in sync. Cc: stable@vger.kernel.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 00daf5f8c50..02debabe9ed 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2895,8 +2895,12 @@ static void set_tracer_flags(unsigned int mask, int enabled)
if (mask == TRACE_ITER_RECORD_CMD)
trace_event_enable_cmd_record(enabled);
- if (mask == TRACE_ITER_OVERWRITE)
+ if (mask == TRACE_ITER_OVERWRITE) {
ring_buffer_change_overwrite(global_trace.buffer, enabled);
+#ifdef CONFIG_TRACER_MAX_TRACE
+ ring_buffer_change_overwrite(max_tr.buffer, enabled);
+#endif
+ }
if (mask == TRACE_ITER_PRINTK)
trace_printk_start_stop_comm(enabled);