netdev - Re: [PATCH net-next] tcp: optimise receiver buffer autotuning initialisation for high latency connections

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Date:   Mon, 7 Dec 2020 18:46:07 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "Mohamed Abuelfotoh, Hazem" <abuehaze@...zon.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "ycheng@...gle.com" <ycheng@...gle.com>,
        "ncardwell@...gle.com" <ncardwell@...gle.com>,
        "weiwan@...gle.com" <weiwan@...gle.com>,
        "Strohman, Andy" <astroh@...zon.com>,
        "Herrenschmidt, Benjamin" <benh@...zon.com>
Subject: Re: [PATCH net-next] tcp: optimise receiver buffer autotuning
 initialisation for high latency connections

On Mon, Dec 07, 2020 at 04:34:57PM +0000, Mohamed Abuelfotoh, Hazem wrote:
> 100ms RTT
> 
> >Which exact version of linux kernel are you using ?
> On the receiver side I could see the issue with any mainline kernel
> version >=4.19.86 which is the first kernel version that has patches
> [1] & [2] included.  On the sender I am using kernel 5.4.0-rc6.

5.4.0-rc6 is a very old and odd kernel to be doing anything with.  Are
you sure you don't mean "5.10-rc6" here?

thanks,

greg k-h