netdev - Re: [PATCH net] selftests: net: let big

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Message-ID: <CADvbK_cWU8-Ydo6rcOPm9MOJVhTPYyYSGX3ZTNUvJVR9ZkstKQ@mail.gmail.com>
Date: Fri, 2 Feb 2024 11:25:11 -0500
From: Xin Long <lucien.xin@...il.com>
To: Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Shuah Khan <shuah@...nel.org>, 
	linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net] selftests: net: let big_tcp test cope with slow env

On Fri, Feb 2, 2024 at 11:07 AM Paolo Abeni <pabeni@...hat.com> wrote:
>
> In very slow environments, most big TCP cases including
> segmentation and reassembly of big TCP packets have a good
> chance to fail: by default the TCP client uses write size
> well below 64K. If the host is low enough autocorking is
> unable to build real big TCP packets.
>
> Address the issue using much larger write operations.
>
> Note that is hard to observe the issue without an extremely
> slow and/or overloaded environment; reduce the TCP transfer
> time to allow for much easier/faster reproducibility.
>
> Fixes: 6bb382bcf742 ("selftests: add a selftest for big tcp")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Acked-by: Xin Long <lucien.xin@...il.com>