From: Neal Cardwell <ncardwell@google.com>
To: Yuchung Cheng <ycheng@google.com>
Cc: David Miller <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Nandita Dukkipati <nanditad@google.com>,
Netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH] tcp: undo spurious timeout after SACK reneging
Date: Sun, 24 Mar 2013 16:50:41 -0400 [thread overview]
Message-ID: <CADVnQy=koYif1cM+VuXirz26jV33zDK2KHNW=EQUfRaGqBHa+g@mail.gmail.com> (raw)
In-Reply-To: <1364157745-24866-1-git-send-email-ycheng@google.com>
On Sun, Mar 24, 2013 at 4:42 PM, Yuchung Cheng <ycheng@google.com> wrote:
> On SACK reneging the sender immediately retransmits and forces a
> timeout but disables Eifel (undo). If the (buggy) receiver does not
> drop any packet this can trigger a false slow-start retransmit storm
> driven by the ACKs of the original packets. This can be detected with
> undo and TCP timestamps.
>
> Signed-off-by: Yuchung Cheng <ycheng@google.com>
> ---
> net/ipv4/tcp_input.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
Acked-by: Neal Cardwell <ncardwell@google.com>
neal
next prev parent reply other threads:[~2013-03-24 20:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-24 20:42 [PATCH] tcp: undo spurious timeout after SACK reneging Yuchung Cheng
2013-03-24 20:50 ` Neal Cardwell [this message]
2013-03-24 21:28 ` David Miller
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