[PATCH 0/3] ftrace: overrun accounting and trace_pipe headers

[Steven Rostedt]

The first patch in this series adds accounting to record overruns. That is
where the writing catches up to the reading of the buffer. This really
only matters for trace_pipe since that's a consumer / producer output file.

The next patch adds new methods for the plugins to hook into the
open_pipe and open_read, to let a plugin produce a header.
The open_read method can also be used to do something when overruns
are detected.

The last patch is a test patch AND SHOULD NOT BE APPLIED. It is just an
example in how to use the new methods to produce a header. It simply
makes the ftrace tracer produce a simple "Test header" before any
output.

-- Steve

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