From: Eric Dumazet <redacted>
Date: Mon, 30 Jul 2012 08:52:21 +0200

From: Eric Dumazet <edumazet@google.com>

One condition before codel_Newton_step() was not good if
we never left the dropping state for a flow. As a result
rec_inv_sqrt was 0, instead of the ~0 initial value.

codel control law was then set to a very aggressive mode, dropping
many packets before reaching 'target' and recovering from this problem.

To keep codel_vars_init() as efficient as possible, refine
the condition to make sure rec_inv_sqrt initial value is correct

Many thanks to Anton Mich for discovering the issue and suggesting
a fix.

Reported-by: Anton Mich <redacted>
Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied and queued up for -stable.