From: Jiri Bohac <jbohac@suse.cz>
Date: Thu, 30 Aug 2012 12:02:47 +0000 (+0000)
Subject: bonding: add some slack to arp monitoring time limits
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~47^2~237
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da210f559019ba1cd4ebee2a28ad158bfb95bab2;p=pandora-kernel.git

bonding: add some slack to arp monitoring time limits

Currently, all the time limits in the bonding ARP monitor are in
multiples of arp_interval -- the time interval at which the ARP
monitor is periodically scheduled.

With a fast network round-trip and a little scheduling latency
of the ARP monitor work, a limit of n*delta_in_ticks may
effectively mean (n-1)*delta_in_ticks.

This is fatal in case of n==1  (the link will stay down
forever) and makes the behaviour non-deterministic in all the
other cases.

Add a delta_in_ticks/2 time slack to all the time limits.

Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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