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Date:      Wed, 17 Feb 2021 10:36:31 -0500
From:      Randall Stewart <rrs@netflix.com>
To:        "Scheffenegger, Richard" <Richard.Scheffenegger@netapp.com>
Cc:        Michael Tuexen <tuexen@freebsd.org>, "rgrimes@freebsd.org" <rgrimes@freebsd.org>, FreeBSD Transports <transport@freebsd.org>
Subject:   Re: TT_KEEP reset
Message-ID:  <CBC6FD82-AA0B-41B7-892E-0FBFDBA796D3@netflix.com>
In-Reply-To: <SN4PR0601MB372808F47CABA8217E82D39786879@SN4PR0601MB3728.namprd06.prod.outlook.com>
References:  <SN4PR0601MB372808F47CABA8217E82D39786879@SN4PR0601MB3728.namprd06.prod.outlook.com>

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I have not followed all the TCPM discussion but how
would tt_rexmt be active if you are in keep-alive?

Keep alive can only go active if there is nothing to send
and nothing outstanding.. so why would tt_rexmt be ever active?

For persists I am not so sure. Normally you go into persists
when you have data to send and the rwnd of the peer has closed.
Again if that=E2=80=99s true i.e. you have data for the peer, then
you would never be in KEEP.. though I could see where the peer
ack=E2=80=99d the last byte and closed its window to zero=E2=80=A6 in =
this
case you *might* want both but I need to think about that case its
a bit strange ;-)

R

> On Feb 16, 2021, at 8:09 AM, Scheffenegger, Richard =
<Richard.Scheffenegger@netapp.com> wrote:
>=20
> Hi,
>=20
> =46rom the discussion @tcpm, around 793bis - shall we add conditionals =
to reset the TT_KEEP timer, in case a tt_persist or tt_rexmt are active?
>=20
> Richard Scheffenegger
>=20
> _______________________________________________
> freebsd-transport@freebsd.org mailing list
> =
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------
Randall Stewart
rrs@netflix.com




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