netdev - Re: [PATCH net 1/2] rxrpc: Fix RTT determination to use any ACK as a source

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Message-ID: <b13a17c9-f374-4466-be02-371a632a7f2d@auristor.com>
Date: Fri, 17 Nov 2023 01:02:51 -0500
From: Jeffrey E Altman <jaltman@...istor.com>
To: David Howells <dhowells@...hat.com>, netdev@...r.kernel.org
Cc: Marc Dionne <marc.dionne@...istor.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net 1/2] rxrpc: Fix RTT determination to use any ACK as a
 source

On 11/16/2023 8:12 AM, David Howells wrote:

> Fix RTT determination to be able to use any type of ACK as the response
> from which RTT can be calculated provided its ack.serial is non-zero and
> matches the serial number of an outgoing DATA or ACK packet.  This
> shouldn't be limited to REQUESTED-type ACKs as these can have other types
> substituted for them for things like duplicate or out-of-order packets.
>
> Fixes: 4700c4d80b7b ("rxrpc: Fix loss of RTT samples due to interposed ACK")
> Signed-off-by: David Howells <dhowells@...hat.com>
> cc: Marc Dionne <marc.dionne@...istor.com>
> cc: "David S. Miller" <davem@...emloft.net>
> cc: Eric Dumazet <edumazet@...gle.com>
> cc: Jakub Kicinski <kuba@...nel.org>
> cc: Paolo Abeni <pabeni@...hat.com>
> cc: linux-afs@...ts.infradead.org
> cc: netdev@...r.kernel.org

Reviewed-by: Jeffrey Altman <jaltman@...istor.com>

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