tree ef0ba4b506ff64fd116270b175b68b49e07ea28e
parent 31fc955230db887b39c08ca32bcd445380f2d63f
author Patrick Williams <patrick@stwcx.xyz> 1733232167 -0500
committer Patrick Williams <patrick@stwcx.xyz> 1741026420 -0500

lg2: use DEBUG_INVOCATION to reduce debug journal

The systemd-v257 release introduced a new convention that can be used
by daemons to reduce the amount of calls to journald for debug-level
messages: DEBUG_INVOCATION[1].  Daemons will typically start with
DEBUG_INVOCATION not set, but in the event of a crash, the daemon will
be restarted with it set.  Daemons are expected to emit higher debug
messages when ran in that mode.

Adjusting the logger code to avoid sending debug messages to journald
unless DEBUG_INVOCATION is set.  This reduces the overhead of logging
by skipping the journald calls entirely.

[1]: https://github.com/systemd/systemd/commit/7d8bbfbe0852ec89590d1dc5e28afc95d6d44fa1

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5896c4714b92786c8f859f2e5ab389753e4b5c26