dmesg/kernel ring buffer timestamps are preserved and continue incrementing across reboot

Issue

• dmesg/kernel ring buffer timestamps are preserved and continue incrementing across reboot

$ uptime
 10:33:14 up 12 min,  4 users,  load average: 0.14, 0.21, 0.13

$ dmesg |tail
[18014442.350802] netlink: 12 bytes leftover after parsing attributes.
[18014458.082795] Fusion MPT base driver 3.04.20
[18014458.083531] Copyright (c) 1999-2008 LSI Corporation
[18014458.090846] Fusion MPT misc device (ioctl) driver 3.04.20
[18014458.091304] mptctl: Registered with Fusion MPT base driver
[18014458.091706] mptctl: /dev/mptctl @ (major,minor=10,220)
[18014462.601225] netlink: 12 bytes leftover after parsing attributes.
[18015012.058051] Bridge firewalling registered
[36029419.402142] ip_tables: (C) 2000-2006 Netfilter Core Team
[18015020.923607] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)