netdev - Re: [PATCH net] tcp: don't use F-RTO on non-recurring timeouts

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Message-Id: <20150715.171756.691061883175724526.davem@davemloft.net>
Date:	Wed, 15 Jul 2015 17:17:56 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ycheng@...gle.com
Cc:	netdev@...r.kernel.org, ncardwell@...gle.com
Subject: Re: [PATCH net] tcp: don't use F-RTO on non-recurring timeouts

From: Yuchung Cheng <ycheng@...gle.com>
Date: Mon, 13 Jul 2015 12:10:20 -0700

> Currently F-RTO may repeatedly send new data packets on non-recurring
> timeouts in CA_Loss mode. This is a bug because F-RTO (RFC5682)
> should only be used on either new recovery or recurring timeouts.
> 
> This exacerbates the recovery progress during frequent timeout &
> repair, because we prioritize sending new data packets instead of
> repairing the holes when the bandwidth is already scarce.
> 
> Fix it by correcting the test of a new recovery episode.
> 
> Signed-off-by: Yuchung Cheng <ycheng@...gle.com>
> Signed-off-by: Neal Cardwell <ncardwell@...gle.com>

Applied, thank you.
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