netdev - Re: [PATCH v2 net-next 6/6] bonding: add an option to fail when any of arp_ip

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Message-ID: <20130621102318.GA7269@unicorn.suse.cz>
Date:	Fri, 21 Jun 2013 12:23:18 +0200
From:	Michal Kubecek <mkubecek@...e.cz>
To:	Veaceslav Falico <vfalico@...hat.com>
Cc:	netdev@...r.kernel.org, fubar@...ibm.com, andy@...yhouse.net,
	davem@...emloft.net, linux@...2.net, nicolas.2p.debian@...e.fr,
	rick.jones2@...com, nikolay@...hat.com
Subject: Re: [PATCH v2 net-next 6/6] bonding: add an option to fail when any
 of arp_ip_target is inaccessible

On Thu, Jun 20, 2013 at 06:35:05PM +0200, Veaceslav Falico wrote:
> @@ -1712,6 +1721,8 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
>  
>  	new_slave->last_arp_rx = jiffies -
>  		(msecs_to_jiffies(bond->params.arp_interval) + 1);
> +	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
> +		new_slave->target_last_arp_rx[i] = jiffies;
>  
>  	if (bond->params.miimon && !bond->params.use_carrier) {
>  		link_reporting = bond_check_dev_link(bond, slave_dev, 1);

For cards with slow initial negotiation, this can cause a down -> up ->
down -> up flap on enslaving. This is why initial walue of last_arp_rx
was modified in commit f31c7937. Is there a reason not to initialize
target_last_arp_rx[i] to the same value?

                                                        Michal Kubecek

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