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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH v2] TCP: avoid to send keepalive probes if it is
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Date: Wed, 21 Apr 2010 22:42:05 -0700 (PDT)
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=46rom: "Ilpo J=E4rvinen" <ilpo.jarvinen@helsinki.fi>
Date: Sun, 18 Apr 2010 23:34:15 +0300 (EEST)

> I fail to see why the addition of this new variable is necessary at a=
ll,=20
> could either of you enlight me why exactly it's necessary and rcv_tst=
amp=20
> will not suffice?

I agree, the existing rcv_tstamp should serve this purpose just
fine.