linux-kernel - Re: [PATCH] net: Add default_advmss() methods to blackhole dst

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Message-ID: <AANLkTi=O1LZzSc8=qMX=R3rJpCVL8eWr1eo6NkiZXS0m@mail.gmail.com>
Date:	Fri, 18 Feb 2011 21:29:43 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	George Spelvin <linux@...izon.com>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	Roland Dreier <roland@...estorage.com>
Subject: Re: [PATCH] net: Add default_advmss() methods to blackhole dst_ops

On Fri, Feb 18, 2011 at 9:24 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Le vendredi 18 février 2011 à 21:16 +0800, Changli Gao a écrit :
>
>> I am wondering why magic number 256 is used here. Is there a special
>> reason? Thanks.
>>
>
> It really doesnt matter. SYN message will be dropped anyway.
>
> 256 happens to be the default value
> of /proc/sys/net/ipv4/route/min_adv_mss
>

Thanks for your explaining. IMHO, ip_rt_min_advmss is better than a
magic number, here.

-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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