[Codel] [PATCH net-next] fq_codel: report congestion notification at enqueue time

[Eric Dumazet]

On Thu, 2012-06-28 at 19:07 +0200, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet at google.com>
> 
> At enqueue time, check sojourn time of packet at head of the queue,
> and return NET_XMIT_CN instead of NET_XMIT_SUCCESS if this sejourn
> time is above codel @target.
> 
> This permits local TCP stack to call tcp_enter_cwr() and reduce its cwnd
> without drops (for example if ECN is not enabled for the flow)
> 
> Signed-off-by: Eric Dumazet <edumazet at google.com>
> Cc: Dave Taht <dave.taht at bufferbloat.net>
> Cc: Tom Herbert <therbert at google.com>
> Cc: Matt Mathis <mattmathis at google.com>
> Cc: Yuchung Cheng <ycheng at google.com>
> Cc: Nandita Dukkipati <nanditad at google.com>
> Cc: Neal Cardwell <ncardwell at google.com>
> ---

Please dont apply this patch, I'll submit an updated version later.

Thanks