CFV: New Project: s390x Port

dalibor topic dalibor.topic at
Mon May 16 14:43:01 UTC 2016

I believe that the discussion already took place on porters-dev:

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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