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Date:   Sat, 9 Feb 2019 09:13:01 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Mark D Rustad <mrustad@gmail.com>
Cc:     linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        torvalds@linux-foundation.org, stable@vger.kernel.org, lwn@lwn.net,
        Jiri Slaby <jslaby@suse.cz>
Subject: Re: Linux 4.4.174
Message-ID: <20190209081301.GB30034@kroah.com>
References: <20190208105422.GA32328@kroah.com>
 <20190208105431.GB32328@kroah.com>
 <870EE9C6-3748-498C-B6E8-33724168C605@gmail.com>
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On Fri, Feb 08, 2019 at 08:44:32PM -0800, Mark D Rustad wrote:
> On Feb 8, 2019, at 2:54 AM, Greg KH <gregkh@linuxfoundation.org> wrote:
> 
> > diff --git a/Documentation/networking/ip-sysctl.txt
> > b/Documentation/networking/ip-sysctl.txt
> > index 2ea4c45cf1c8..7c229f59016f 100644
> > --- a/Documentation/networking/ip-sysctl.txt
> > +++ b/Documentation/networking/ip-sysctl.txt
> > @@ -112,14 +112,11 @@ min_adv_mss - INTEGER
> > 
> >  IP Fragmentation:
> > 
> > -ipfrag_high_thresh - INTEGER
> > -	Maximum memory used to reassemble IP fragments. When
> > -	ipfrag_high_thresh bytes of memory is allocated for this purpose,
> > -	the fragment handler will toss packets until ipfrag_low_thresh
> > -	is reached. This also serves as a maximum limit to namespaces
> > -	different from the initial one.
> > -
> > -ipfrag_low_thresh - INTEGER
> > +ipfrag_high_thresh - LONG INTEGER
> > +	Maximum memory used to reassemble IP fragments.
> > +
> > +ipfrag_low_thresh - LONG INTEGER
> > +	(Obsolete since linux-4.17)
> 
> It seems very strange to say that it is obsolete since 4.17 in a 4.4 kernel.

4.17 is a point in time :)