Comment 4 for bug 1548190

Reviewed: https://review.openstack.org/399535
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=d1930cefd27448eefc373a229a26f8da25581983
Submitter: Jenkins
Branch: master

commit d1930cefd27448eefc373a229a26f8da25581983
Author: Kevin Benton <email address hidden>
Date: Fri Nov 18 04:25:32 2016 -0700

    Lock in DHCP agent based on network_id

    All cache operations and dnsmasq process operations
    are scoped to a network ID so we can always safely
    perform concurrent actions on different network IDs.
    This patch adjusts the DHCP agent to lock based on
    network ID rather than having a global lock for every
    operation.

    sync_state calls are still protected with a reader/writer
    lock to ensure that when sync_state needs to run, all
    other operations are blocked.

    Related-Bug: #1548190
    Change-Id: I56010dc801d82be56f12e834c5164316872c2f8b