Is 32-bit Arm support being actively maintained in JDK21 and head?

[Lindenmaier, Goetz]

Hi,

I can not remember arm32 GHA failures in 17 or 11.  But without checking
I think there were backports dedicated to that platform.  So the maintenance
fits the needs. It's probably also a platform that just compiles if other linux
platforms do so.  Win32 might be more fragile there.

Another example is Solaris and Sparc in 11. They have only very sporadic
developer attention, and there are no GHA tests.

Best regards,
  Goetz.

From: jdk-dev <jdk-dev-retn at openjdk.org> On Behalf Of Aleksei Voitylov
Sent: Wednesday, December 6, 2023 7:54 PM
To: Stewart Addison <sxa at redhat.com>
Cc: jdk-dev at openjdk.org; porters-dev at openjdk.org; boris.ulasevich at bell-sw.com; snazarkin at azul.com
Subject: Re: Is 32-bit Arm support being actively maintained in JDK21 and head?

The definition of "actively maintained" may vary, depending on who you ask. I'd rather say we are keeping the lights on in head. I recently fixed a couple of issues related to ARM32, namely 8315940, 8316879. There is more in the pipeline following 8301997/8320278 (the full fix is being tested now, will post it soon).

It's hard to answer on behalf of all maintainers, but the intent from BellSoft end is to continue to keep the lights on for now. Will there be time when we abandon this port? Definitely. But I don't think it has come just yet.

If you are willing to help with this effort, you are warmly welcome.

-Aleksei

On Wed, 6 Dec 2023 at 20:14, Stewart Addison <sxa at redhat.com<mailto:sxa at redhat.com>> wrote:
Hi everyone,

This is a bit of a follow up to the discussion on Windows 32-bit builds in the jdk-dev thread from yesterday, but is anyone currently actively maintaining the 32-bit Arm code for the JDK21 and HEAD streams? Noting that unlike Win32, there are GitHub PR tests for Arm32 so failures are more likely to get noticed than for Win32.
Eclipse Temurin has not yet released a version of JDK21 but we have had a user ask about whether we will do so (issue link<https://github.com/adoptium/adoptium-support/issues/962>), since we have done so for previous LTS releases. As input to making a decision on this it would be helpful to understand if the platform has a strong support story upstream for the latest release streams which would be important to us to be able to maintain such a release, or if it is likely to go the same way as Win32 i.e. that it will suffer failures over time which would make it harder to support it along with the other platform ports.

The wiki at https://wiki.openjdk.org/display/hotspot/ports lists Boris Ulasevich and Sergey Nazarkin as maintainers, so I've explicitly copied both on this email but I'm looking to see if there is still active maintenance going on with the Arm32 port from any members of the openjdk community for the newer codebases, or whether there is any possibility of it being deprecated at some point like Win32.

Thanks in advance,

Stewart...
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