ring-buffer/tracing: Have iterator acknowledge dropped events

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Have the ring_buffer_iterator set a flag if events were dropped as it were
to go and peek at the next event. Have the trace file display this fact if
it happened with a "LOST EVENTS" message.

Link: http://lkml.kernel.org/r/20200317213417.045858900@goodmis.org

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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Steven Rostedt (VMware) 2020-03-17 17:32:32 -04:00

parent 06e0a548ba

commit c9b7a4a72f

3 changed files with 29 additions and 4 deletions

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1

include/linux/ring_buffer.h

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16

kernel/trace/ring_buffer.c

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16

kernel/trace/trace.c

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