This file is indexed.

/lib/systemd/system/ksm.service is in ksmtuned 4.20150325build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[Unit]
Description=Kernel Samepage Merging
ConditionPathExists=/sys/kernel/mm/ksm

[Service]
Type=oneshot
RemainAfterExit=yes
EnvironmentFile=-/etc/default/ksm
ExecStart=/usr/sbin/ksmctl start
ExecStop=/usr/sbin/ksmctl stop

[Install]
WantedBy=multi-user.target