trace-cmd: Allow setting of buffer size to instances

When the '-b' option is set after the instance option '-B' the
buffer size will affect the instance buffer and not any other
instance buffer. This is for trace-cmd start and reset.

For example:

  trace-cmd reset -t -B foo -b 1

Will reset the buffer size for foo and not touch the top level
buffer size.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
3 files changed