netdev - Re: [PATCH net-next 3/3] tcp: implement head drops in backlog queue

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Message-ID: <CANn89i+9iuhUUwOhdEUs+xzgus6B1NSY534g-fBvf8Ns9Sa1pQ@mail.gmail.com>
Date:   Wed, 21 Nov 2018 16:18:13 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     Yuchung Cheng <ycheng@...gle.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Jean-Louis Dupond <jean-louis@...ond.be>,
        Neal Cardwell <ncardwell@...gle.com>
Subject: Re: [PATCH net-next 3/3] tcp: implement head drops in backlog queue

On Wed, Nov 21, 2018 at 3:52 PM Eric Dumazet <edumazet@...gle.com> wrote:
> This is basically what the patch does, the while loop breaks when we have freed
> just enough skbs.

Also this is the patch we tested with Jean-Louis on his host, bring
very nice results,
even from an old stack sender (the one that had problems with the SACK
compression we just fixed)

Keep in mind we are dealing here with the exception, I would not spend
too much time
testing another variant if this one simply works.