CONFIG_EVENT_TRACING (not configurable)

modulename: trace.ko

and/or

blktrace.ko

and/or

trace_events.ko

and/or

trace_export.ko

and/or

trace_event_perf.ko

and/or

trace_events_filter.ko

and/or

trace_events_trigger.ko

configname: CONFIG_EVENT_TRACING

Linux Kernel Configuration
└─>EVENT_TRACING
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
source code:
arch/x86/xen/trace.c