netdev - Re: [PATCH] tcp: call tcp_replace_ts_recent() from tcp

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Message-ID: <CADVnQy=MSA+ZApkyLHK=Bm25wsyma7PDnZuOVZmcTmqsgyZ_ug@mail.gmail.com>
Date:	Fri, 19 Apr 2013 13:14:41 -0400
From:	Neal Cardwell <ncardwell@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Yuchung Cheng <ycheng@...gle.com>
Subject: Re: [PATCH] tcp: call tcp_replace_ts_recent() from tcp_ack()

On Fri, Apr 19, 2013 at 1:01 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Fri, 2013-04-19 at 09:59 -0700, Eric Dumazet wrote:
>> On Fri, 2013-04-19 at 12:33 -0400, Neal Cardwell wrote:
>>
>> > This patch looks good. But AFAICT the other call site for
>> > tcp_replace_ts_recent() has the same bug, which can be fixed in the
>> > same way: tcp_rcv_state_process() seems to fall through the big switch
>> > statement down to its call to tcp_replace_ts_recent() even in some
>> > cases where tcp_ack() already decided the ACK was unacceptable.
>>
>> I was not sure of the second call site, and was willing to discuss this
>> with you and Yuchung.
>>
>> Are you comfortable this is net material and not net-next ? (We are
>> talking of states other than ESTABLISHED)
>
> The other concern was about conflict with the prior net-next patch (tcp:
> remove one indentation level in tcp_rcv_state_process())

Good point. How about fixing both tcp_replace_ts_recent() call sites
in net-next, as a single patch after your  "tcp: remove one
indentation level in tcp_rcv_state_process()" net-next patch?

neal
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