netdev - Re: [PATCH] TCP_USER_TIMEOUT: a new socket option to specify max timeout before a TCP connection is aborted

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Message-Id: <20100829.211954.232753860.davem@davemloft.net>
Date:	Sun, 29 Aug 2010 21:19:54 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	hkchu@...gle.com
Cc:	eric.dumazet@...il.com, hannemann@...s.rwth-aachen.de,
	hagen@...u.net, lars.eggert@...ia.com, netdev@...r.kernel.org
Subject: Re: [PATCH] TCP_USER_TIMEOUT: a new socket option to specify max
 timeout before a TCP connection is aborted

From: Jerry Chu <hkchu@...gle.com>
Date: Sun, 29 Aug 2010 17:23:05 -0700

> Personally I think as an API, it's easier for an application to
> grasp the concept of a time quantity than # of
> retransmissions. (E.g., how will an app determine it needs 10
> retries vs 20 retries?)

Conversely how can the user grasp how many actual attempts will
be made if backoff is employed?

It's very easy to under-cap the number of actual packet send
attempts that will be made specifying just a timeout, in the
presence of backoff.
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