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From: Doug Freed <dwfreed@mtu.edu>
Date: Sun, 13 Apr 2025 15:27:43 -0500
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Subject: [gentoo-dev] Re: news item draft: Gentoo raises s390x baseline to z10
To: releng@gentoo.org
Cc: gentoo-dev@lists.gentoo.org, pr@gentoo.org, s390@gentoo.org
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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. H=C3=BCttel <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=3Dz10).
>
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. H=C3=BCttel
> dilfridge@gentoo.org
> Gentoo Linux developer
> (council, toolchain, base-system, perl, libreoffice)
-dwfreed
--000000000000350c0e0632aec556
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto"><div><div class=3D"gmail_quote gmail_quote_container"><di=
v dir=3D"ltr" class=3D"gmail_attr">On Sun, Apr 13, 2025, 13:18 Andreas K. H=
uettel <<a href=3D"mailto:dilfridge@gentoo.org">dilfridge@gentoo.org</a>=
> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Draf=
t to be published ASAP, feedback welcome...<br>
<br>
<br>
<br>
Title: Gentoo raises s390x baseline to z10<br>
Author: Andreas K. H=C3=BCttel <<a href=3D"mailto:dilfridge@gentoo.org" =
target=3D"_blank" rel=3D"noreferrer">dilfridge@gentoo.org</a>><br>
Posted: xxxx-xx-xx<br>
Revision: x<br>
News-Item-Format: 2.0<br>
Display-If-Profile: default/linux/s390/17.0/s390x<br>
Display-If-Profile: default/linux/s390/17.0/s390x/systemd/merged-usr<br>
Display-If-Profile: default/linux/s390/23.0/split-usr/s390x<br>
Display-If-Profile: default/linux/s390/23.0/s390x<br>
Display-If-Profile: default/linux/s390/23.0/s390x/systemd<br>
<br>
Since more and more software for s390x assumes the presence of a more<br>
recent processor, we will raise in 64bit s390x profiles the ISA baseline<br=
>
for the catalyst stage builds and the published binary packages from <br>
z900 to z10 (i.e., -march=3Dz10).<br></blockquote></div></div><div dir=3D"a=
uto"><br></div><div dir=3D"auto">This wording is a little awkward.=C2=A0 I =
suggest "[...] we will raise the ISA baseline in 64bit s390x profiles =
for the catalyst stage builds [...]"</div><div dir=3D"auto"><br></div>=
<div dir=3D"auto"><div class=3D"gmail_quote gmail_quote_container"><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
solid rgb(204,204,204);padding-left:1ex">
<br>
* If you are running an installation and emerge locally from source, <br>
=C2=A0 this does not affect you.<br>
<br>
* If you are running an installation and use our binary packages, <br>
=C2=A0 please make sure you have compatibility for z10 or switch to buildin=
g<br>
=C2=A0 from source.<br>
<br>
* The 64bit s390x stages will only work with machines compatible with<br>
=C2=A0 z10.<br>
<br>
* This does not affect the 31bit s390 stages or packages.<br>
<br>
The z10 Enterprise Class (2097 series) was introduced in February 2008 [1],=
<br>
which essentially means everyone except hardware archaeologists should be<b=
r>
fine.<br>
<br>
Note that z10 is still a very conservative setting; on modern machines<br>
a newer ISA is strongly recommended.<br>
<br>
[1] <a href=3D"https://en.wikipedia.org/wiki/IBM_Z" rel=3D"noreferrer noref=
errer" target=3D"_blank">https://en.wikipedia.org/wiki/IBM_Z</a><br>
<br>
-- <br>
Andreas K. H=C3=BCttel<br>
<a href=3D"mailto:dilfridge@gentoo.org" target=3D"_blank" rel=3D"noreferrer=
">dilfridge@gentoo.org</a><br>
Gentoo Linux developer<br>
(council, toolchain, base-system, perl, libreoffice)</blockquote></div></di=
v><div dir=3D"auto"><br></div><div dir=3D"auto">-dwfreed</div><div dir=3D"a=
uto"></div></div>
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