netdev - Re: [PATCH] tcp/dccp: replace using only even ports with all ports

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Message-ID: <CANn89iKrebOtKsZptq_NMhwCGOVbrp=QgAYnJE3OPsC1__N+HQ@mail.gmail.com>
Date: Mon, 22 Jul 2024 07:50:39 -0700
From: Eric Dumazet <edumazet@...gle.com>
To: xiaolinkui@....com
Cc: davem@...emloft.net, dsahern@...nel.org, kuba@...nel.org, 
	pabeni@...hat.com, netdev@...r.kernel.org, 
	Linkui Xiao <xiaolinkui@...inos.com>
Subject: Re: [PATCH] tcp/dccp: replace using only even ports with all ports

On Mon, Jul 22, 2024 at 2:41 AM <xiaolinkui@....com> wrote:
>
> From: Linkui Xiao <xiaolinkui@...inos.com>
>
> In commit 207184853dbd ("tcp/dccp: change source port selection at connect()
> time"), the purpose is to address the issue of increased costs when all even
> ports are in use.
>
> But in my testing environment, this more cost issue has not been resolved.

You missed the whole point of 1580ab63fc9a ("tcp/dccp: better use of
ephemeral ports in connect()")

Have you read 207184853dbd ("tcp/dccp: change source port selection at
connect() ..." changelog and are you using IP_LOCAL_PORT_RANGE ?