[RFC] doc: update required kernel version to 4.14

[Morten Brørup]

> From: Stephen Hemminger [mailto:stephen at networkplumber.org]
> Sent: Tuesday, 2 August 2022 17.36
> 
> The 4.4 kernel was end of life in February 2022,
> and the next LTS is 4.9 and it is reaching EOL in January 2023.
> The main distro using 4.9 is Debian Stretch and it is no longer
> supported. When DPDK 22.11 is released, the 4.9 kernel would
> only be receiving fixes for three months; therefore
> lets make the official version 4.14.

Makes very good sense to me.

> 
> As always, current major enterprise Linux releases will continue
> to be supported, but those releases don't track regular kernel
> version numbering.
> 
> For full details on kernel support see:
> https://www.kernel.org/category/releases.html
> https://en.wikipedia.org/wiki/Linux_kernel_version_history
> 
> Debian Stretch:
> https://www.debian.org/releases/stretch/
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---
>  doc/guides/linux_gsg/sys_reqs.rst | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/doc/guides/linux_gsg/sys_reqs.rst
> b/doc/guides/linux_gsg/sys_reqs.rst
> index 08d45898f025..ed22b6e80b4c 100644
> --- a/doc/guides/linux_gsg/sys_reqs.rst
> +++ b/doc/guides/linux_gsg/sys_reqs.rst
> @@ -105,7 +105,7 @@ System Software
> 
>  **Required:**
> 
> -*   Kernel version >= 4.4
> +*   Kernel version >= 4.14
> 
>      The kernel version required is based on the oldest long term
> stable kernel available
>      at kernel.org when the DPDK version is in development.

Shouldn't we generalize your reasoning and update this too? It should reflect that we require more than 3 months to projected EOL, e.g. minimum one year.

> --
> 2.35.1
>