Re: [PATCH v2] tcp: fix infinite cwnd in tcp_complete_cwr()

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On Mon, Apr 30, 2012 at 12:00 PM, Yuchung Cheng <ycheng@xxxxxxxxxx> wrote:
> When the cwnd reduction is done, ssthresh may be infinite
> if TCP enters CWR via ECN or F-RTO. If cwnd is not undone, i.e.,
> undo_marker is set, tcp_complete_cwr() falsely set cwnd to the
> infinite ssthresh value. The correct operation is to keep cwnd
> intact because it has been updated in ECN or F-RTO.
> Signed-off-by: Yuchung Cheng <ycheng@xxxxxxxxxx>
> ---
> ChangeLog since v1:
>  - Add snd_cwnd_stamp timestamping in CWR mode
>  net/ipv4/tcp_input.c |    9 ++++++---
>  1 files changed, 6 insertions(+), 3 deletions(-)

Acked-by: Neal Cardwell <ncardwell@xxxxxxxxxx>

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