CFV: New Project: s390x Port

Vladimir Kozlov vladimir.kozlov at
Mon May 16 18:46:10 UTC 2016

Vote: yes

On 5/14/16 12:03 AM, 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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