philsauce:

Using OpenWrt trunk, if a dnsmasq section is removed from the dhcp uci file, its host file will remain in /tmp/hosts/

To replicate:

Set the content of /etc/config/dhcp to:

config dnsmasq 'foo'

config 'domain'
option instance 'bar'
option name 'baz'
option ip '127.1.1.1'


Run:
/etc/init.d/dnsmasq reload

Set the content of /etc/config/dhcp to:

config dnsmasq 'foo'


Run:
/etc/init.d/dnsmasq reload

The file /tmp/hosts/dhcp.bar still exists, and its content will remain in effect for connected clients.