Commit 8dc35020 authored Apr 03, 2019 by Nikolay Aleksandrov Committed by David S. Miller Apr 04, 2019

net: bridge: optimize backup_port fdb convergence



We can optimize the fdb convergence when a backup_port is present by not
immediately flushing the entries of the stopped port since traffic for
those entries will flow towards the backup_port.

There are 2 cases specifically that benefit most:
- when the stopped port comes up before the entries expire by themselves
- when there's an external entry refresh and they're kept while the
  backup_port is operating (e.g. mlag)

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent a0640e61

net/bridge/br_stp_if.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -117,6 +117,7 @@ void br_stp_disable_port(struct net_bridge_port *p)
		del_timer(&p->forward_delay_timer);
		del_timer(&p->hold_timer);

		if (!rcu_access_pointer(p->backup_port))
		br_fdb_delete_by_port(br, p, 0, 0);
		br_multicast_disable_port(p);

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