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    SubjectRe: [PATCH] IPv4/IPv6: update sysctl files
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    From: Shen Feng <shen@cn.fujitsu.com>
    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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