Subject: Re: [PATCH net-next] tcp: inherit listener congestion control for passive cnx

From: Rick Jones <[email-masked]>
Date: Wed, 30 Nov 2011 13:28:57 -0800

>
> Rick Jones reported that TCP_CONGESTION sockopt performed on a listener
> was ignored for its children sockets : right after accept() the
> congestion control for new socket is the system default one.
>
> This seems an oversight of the initial design (quoted from Stephen)
>
> Based on prior investigation and patch from Rick.
>
> Reported-by: Rick Jones<[email-masked]>
> Signed-off-by: Eric Dumazet<[email-masked]>
> CC: Stephen Hemminger<[email-masked]>
> CC: Yuchung Cheng<[email-masked]>

Tested-by: Rick Jones <[email-masked]>

Works as expected/desired with my test program, and doesn't appear to 
affect performance measurably (loopback netperf TCP_CC test on a 1 VCPU 
guest).

rick jones