[gentoo-dev] Re: news item draft: Gentoo raises s390x baseline to z10

[Doug Freed <dwfreed@mtu.edu>]

[-- Attachment #1: Type: text/plain, Size: 1917 bytes --]

On Sun, Apr 13, 2025, 13:18 Andreas K. Huettel <dilfridge@gentoo.org> wrote:

> Draft to be published ASAP, feedback welcome...
>
>
>
> Title: Gentoo raises s390x baseline to z10
> Author: Andreas K. Hüttel <dilfridge@gentoo.org>
> Posted: xxxx-xx-xx
> Revision: x
> News-Item-Format: 2.0
> Display-If-Profile: default/linux/s390/17.0/s390x
> Display-If-Profile: default/linux/s390/17.0/s390x/systemd/merged-usr
> Display-If-Profile: default/linux/s390/23.0/split-usr/s390x
> Display-If-Profile: default/linux/s390/23.0/s390x
> Display-If-Profile: default/linux/s390/23.0/s390x/systemd
>
> Since more and more software for s390x assumes the presence of a more
> recent processor, we will raise in 64bit s390x profiles the ISA baseline
> for the catalyst stage builds and the published binary packages from
> z900 to z10 (i.e., -march=z10).
>

This wording is a little awkward.  I suggest "[...] we will raise the ISA
baseline in 64bit s390x profiles for the catalyst stage builds [...]"


> * If you are running an installation and emerge locally from source,
>   this does not affect you.
>
> * If you are running an installation and use our binary packages,
>   please make sure you have compatibility for z10 or switch to building
>   from source.
>
> * The 64bit s390x stages will only work with machines compatible with
>   z10.
>
> * This does not affect the 31bit s390 stages or packages.
>
> The z10 Enterprise Class (2097 series) was introduced in February 2008 [1],
> which essentially means everyone except hardware archaeologists should be
> fine.
>
> Note that z10 is still a very conservative setting; on modern machines
> a newer ISA is strongly recommended.
>
> [1] https://en.wikipedia.org/wiki/IBM_Z
>
> --
> Andreas K. Hüttel
> dilfridge@gentoo.org
> Gentoo Linux developer
> (council, toolchain, base-system, perl, libreoffice)


-dwfreed

[-- Attachment #2: Type: text/html, Size: 2932 bytes --]