reduce aggressiveness on congested links
reduce aggressiveness on congested links

stall timeouts are used to make lookup tasks more aggressive based on
observed RTTs. This works well, but under some circumstanes packet drops
can increase without affecting the RTTs of those that ara not dropped,
e.g. when conntrack tables get saturated.

use timeout / success ratios to tweak the stall timeouts
the8472/mldht,the8472/mldht