tracing/histogram: Document variable stacktrace

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Add a little documentation (and a useful example) of how a stacktrace can
be used within a histogram variable and synthetic event.

Link: https://lkml.kernel.org/r/20230117152236.320181354@goodmis.org

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Ross Zwisler <zwisler@google.com>
Cc: Ching-lin Yu <chinglinyu@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

...

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Steven Rostedt (Google) 2023-01-17 10:21:30 -05:00

parent cc5fc8bfc9

commit 88238513bb

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Documentation/trace/histogram.rst

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