Trace Normal Form EOF
Trace Normal Form (tnf) is old tracing system in Illumos. It is not used, its functionality was replaced by dtrace.
It is represented by several userspace commands, userspace library support, kernel module and probes in uts and in in.dhcpd
The plan is to remove userspace part (including probes in in.dhcpd), then remove probes which has direct replacement in dtrace (many entry/return tnf probes), then analyze the rest of probes and select those which can be replaced by some static dtrace probes and finally remove the rest.
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