netdev - Re: [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory limits

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Message-ID: <d045271a-7380-17c8-06a2-608ff65f52ee@gmail.com>
Date:   Fri, 12 Jul 2019 09:05:03 +0200
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Jonathan Lemon <jonathan.lemon@...il.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Cc:     "Prout, Andrew - LLSC - MITLL" <aprout@...mit.edu>,
        Christoph Paasch <christoph.paasch@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Looney <jtl@...flix.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Tyler Hicks <tyhicks@...onical.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Bruce Curtis <brucec@...flix.com>,
        Dustin Marquess <dmarquess@...le.com>
Subject: Re: [PATCH net 2/4] tcp: tcp_fragment() should apply sane memory
 limits



On 7/11/19 9:04 PM, Jonathan Lemon wrote:
 
> I discovered we have some production services that set SO_SNDBUF to
> very small values (~4k), as they are essentially doing interactive
> communications, not bulk transfers.  But there's a difference between
> "terrible performance" and "TCP stops working".

You had a copy of these patches month ago, yet you discovered this issue today ?

I already said I was going to work on the issue,
no need to add pressure on me, I had enough of it already.