linux-kernel - Re: [PATCH net-next] ipv4: delete sysctls about routing cache

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Date:   Fri, 24 Dec 2021 02:02:23 +0000
From:   CGEL <cgel.zte@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        prestwoj@...il.com, xu.xin16@....com.cn, zxu@...kedin.com,
        praveen5582@...il.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH net-next] ipv4: delete sysctls about routing cache

On Thu, Dec 23, 2021 at 08:47:02AM -0800, Jakub Kicinski wrote:
> On Thu, 23 Dec 2021 12:20:10 +0000 cgel.zte@...il.com wrote:
> > From: xu xin <xu.xin16@....com.cn>
> > 
> > Since routing cache in ipv4 has been deleted in 2012, the sysctls about
> > it are useless.
> 
> Search for those on GitHub. Useless or not, there is software which
> expects those files to exist and which may break if they disappear.
> That's why they were left in place.
Maybe we can note these inoperative interfaces in ip-sysctl.rst or
somewhere else, suggesting users not to use them any longer.

Wish you merry christmas in advance.
Xu Xin