CFV: New Project: s390x Port

David Holmes david.holmes at
Mon May 16 20:53:26 UTC 2016

On 17/05/2016 12:43 AM, dalibor topic wrote:
> I believe that the discussion already took place on porters-dev:

Pre-discussion perhaps :) Official discussion should have been on the 
discuss list.

Also it seems some people are sending their votes to the discuss list 
when they should go to the announce list.

I suggest this CFV be withdrawn and restarted with only the correct 
mailing list involved.


> cheers,
> dalibor topic
> On 16.05.2016 06:42, David Holmes wrote:
>> Hi Volker,
>> Call for votes go to the announce list, while calls for discussion of
>> project proposals go to the discuss list. You sent this CFV to both ??
>> Was there an intent to initiate a discussion before the vote?
>> Thanks,
>> David
>> On 14/05/2016 5:03 PM, Volker Simonis wrote:
>>> I hereby propose the creation of the "s390x Port" Project with me,
>>> Volker Simonis as the Lead and the Porters Group as the sponsoring
>>> Group.
>>> The goal of the project will be to provide a full-featured and
>>> certifiable version of the OpenJDK on the Linux/s390x platform which
>>> can be integrated into the main OpenJDK development branch.
>>> The port will run on IBM System z models z10 or newer (64-bit) [3].
>>> We (SAP) already have a complete (i.e. template interpreter, C1 and C2
>>> JIT) and certified (Java 4-8) s390x port which is used in production
>>> for many years.
>>> Our plan is to integrate the s390x port into a branch of the actual
>>> OpenJDK development code line (currently jdk9). Once the port is
>>> complete, we plan to integrate it into the then active OpenJDK
>>> development branch and potentially downport it to older releases.
>>> Based on the experience we gained with our PowerPC/AIX Port, we expect
>>> the s390x port to be much easier and less intrusive because s390x is
>>> a CISC processor with a strong memory model (comparable to x86). It
>>> only requires very few shared code changes and no OS changes at all
>>> because the port will only run on Linux.
>>> The project will initially be driven by SAP and supported by IBM both
>>> of whom have a long-standing experience in developing and porting
>>> JDKs to various platforms including Linux/s390x, Linux/PowerPC and
>>> AIX/PowerPC. But as this is an open source project of course anybody
>>> interested is highly welcome to join the porting effort. The complete
>>> development process and discussions will happen in the open on the
>>> project mailing list.
>>> I will lead the project. I work for SAP in the SAP JVM Technology
>>> group since more than 10 years. I'm the project lead of the
>>> PowerPC/AIX Port Project [4], a member of the Build, HotSpot and
>>> OpenJDK Members Group [5] and an active jdk9 committer and reviewer.
>>> The initial committers will be:
>>> Lutz Schmidt (SAP)
>>> Martin Doerr (SAP)
>>> Goetz Lindenmaier (SAP)
>>> Volker Simonis (SAP)
>>> Votes are due by May 28, 2016, 18:00 CET [6].
>>> Only current OpenJDK Members [1] are eligible to vote on this
>>> motion. Votes must be case in the open by replying to to this
>>> mailing list.
>>> For Lazy Consensus voting instructions, see [2].
>>> Volker Simonis
>>> PS: it's a funny coincidence and hopefully lucky omen that I post this
>>> CFV exactly four years to the day I posted the CFV for the PowerPC/AIX
>>> port :) [7]
>>> [1]
>>> [2]
>>> [3]
>>> [4]
>>> [5]
>>> [6]
>>> [7]

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