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SubjectRe: [PATCH] IPv4/IPv6: update sysctl files
From: Shen Feng <>
Date: Wed, 08 Apr 2009 11:28:21 +0800

> on 04/08/2009 10:47 AM, Ben Hutchings wrote:
>> On Wed, 2009-04-08 at 02:39 +0000, Shen Feng wrote:
>>> Now the following sysctl files in /proc/sys/net/ipv4 are used by
>>> both IPv4 and IPv6.
>>> tcp_mem tcp_rmem tcp_wmem
>>> udp_mem udp_rmem_min udp_wmem_min
>>> Putting them in /proc/sys/net/ipv4 is not a good choice.
>> [...]
>> But this is part of the ABI to userland. You cannot remove sysctl files
>> without long advance notice documented in feature-removal-schedule.txt
>> (if at all).
>> If it is possible to add the paths
>> /proc/sys/net/{tcp,udp} while retaining aliases under /proc/sys/net/ipv4
>> then that might be a workable solution.
> Thanks. That's a good solution.
> But I'm still confused.
> Why not create another tcp_mem in /proc/sys/net/ipv6?

People just need to understand that ipv4 is always going to be
there and that's where all the tcp controls are.

I really am not going to entertain changes that try to move generic
inet sysctl things out of the ipv4 directory. There is really no
point at all.

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