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

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Message-ID: <D78D31DF-F032-4EFB-BB79-31750797908D@amazon.com>
Date:   Mon, 7 Dec 2020 17:54:31 +0000
From:   "Mohamed Abuelfotoh, Hazem" <abuehaze@...zon.com>
To:     Greg KH <gregkh@...uxfoundation.org>
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

>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?

I was able to reproduce it on the latest mainline kernel as well  so anything newer than 4.19.85 is just broken.

Thank you.

Hazem

On 07/12/2020, 17:45, "Greg KH" <gregkh@...uxfoundation.org> wrote:

    CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe.



    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




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