SPL HOSTID

[    2.369380] Switched to clocksource tsc
[    2.675954] SPL: using hostid 0x00000000
[    8.177681] NET: Registered protocol family 10
[    8.178396] systemd[1]: Inserted module 'ipv6'

Hi, ryao
What's the meaning of hostid? should I and how to set id under Gentoo?
Thanks.
