tracing: Add hist trigger onchange() handler

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Add support for a hist:onchange($var) handler, similar to the onmax()
handler but triggering whenever there's any change in $var, not just a
max.

Link: http://lkml.kernel.org/r/dfbc7e4ada242603e9ec3f049b5ad076a07dfd03.1550100284.git.tom.zanussi@linux.intel.com

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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Tom Zanussi 2019-02-13 17:42:48 -06:00 • committed by Steven Rostedt (VMware)

parent fd451a3d92

commit dff81f5592

2 changed files with 52 additions and 9 deletions

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3

kernel/trace/trace.c

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58

kernel/trace/trace_events_hist.c

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