2025-10-23 Linaro Data Center Group steering committee Meeting Agenda/Minutes

When? 4th Thursday of each month.

Zoom connection details

• Meeting ID: 938 5333 7073

• Computer: https://linaro-org.zoom.us/j/93853337073

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• Previous meeting minutes: 2025-09-25 Linaro Data Center Group steering committee Meeting Agenda/Minutes

• Project Updates

• Events

• Next meetings

• AOB

• INSERT

• Project Updates

  • Deploy CCA on Arm Platforms (DCAP)

    • Updates since last meeting:

      • Memory Encryption Contexts (MEC) basic support accepted upstream for QEMU 10.2.

      • Kata containers

        • RME support upstreamed for runtime-go (based on cca/v8 source tree).

        • RME support included in kata-deploy: automatic build and deploy of Kata containers with RME available now.

        • runtime-rs: fixed issues. Capable to boot to Realm, but still not functional.

    • Next tasks:

      • MEC: Working on actual (fake) encryption of the memory contexts.

      • Device Assignment

        • Work on the proper integration between SPDM/TDISP and QEMU.

        • Continue the work to support all SMMU features need for DA on QEMU.

      • Kata containers

        • Finish enablement of RME support on runtime-rs.

        • Produce proper documentation and scripts to run Kata containers with RME support.

        • Add k0s support on RME-enabled host on kata-deploy in Kata containers CI.

      • Veraison

        • Add capability to process an extended CCA attestation token.

      • Standards

        • Continue the work on the Attested TLS and CoSERV working groups.

        • Continue the work on CCA token standardization.

        • Continue the work on the CCA token extension for device assignment.

  • Performance Optimization (PO)

    • Updates since last meeting:

      • OpenSSL

        • SM4: investigated why SM4-CBC with Neon/Neon+AESE is slower than the C implementation; as expected, no areas for improvement.

        • Camellia: Port of byte-sliced (suitable for parallel block cipher modes) Camellia encryption implementation from C-intrinsics to Armv8 (Neon+AESE) close to completion (so far standalone), promising a several-fold speed-up over the plain C implementation, currently available in OpenSSL.

    • Next tasks:

      • OpenSSL Camellia: continue the porting to Armv8 Neon+AESE.

  • Big Data & Data Science (BDDS)

    • Updates since last meeting:

      • Apache Doris:

        • Investigated some optimization opportunities with SVE, but some code will only have better performance when SVE2 is used, so keeping the Neon implementation for now.

        • Implemented Neon code to optimize block bloom filter

      • Apache Gluten

        • Basic CI on Arm64 set up.

      • Bigtop Manager:

        • 1.1 features development finished.

        • Working on bug fixes now.

        • Release vote coming by the end of the month.

    • Next tasks:

      • Apache Doris: continue work on performance optimization.

      • Bigtop Manager: release 1.1 version.

  • Enhanced Software-Defined-Storage on Arm Servers (STOR)

    • Updates since last meeting:

      • JuiceFS: released a performance tuning guide document.

    • Next tasks:

      • JuiceFS: continue working on performance optimization.

      • Lustre: Arm64 CI maintenance.

      • Key-Value Cache: performance investigation.

• Events

  • Open Source Firmware Conference (OSFC): 7-10 October, Sunnyvale, CA, USA

    • Leonardo and Kangkang attended. Highlights from Leonardo:

      • Cyber Resiliency Act (CRA) and how that will affect open source firmwares.

      • IPMI never dies.

      • OpenBMC widely used.

      • Firmware CI: similar to OneLab.

  • OCP Global Summit: 14-16 October, 2025, San Jose, CA, USA

    • Clashes with LPM. Leonardo didn't attend.

  • Linaro Partners Meeting (LPM): 14-16 October, 2025, London, UK

  • IETF 124: 1-7 November, Montreal, Canada

    • Linaro and Arm will attend remotely.

  • KubeCon North America: 10-13 November, 2025, Atlanta, GA, USA

    • Kevin, from Linaro, will attend.

  • Linux Plumbers: 11-13 December 2025, Tokyo, Japan

    • Linaro will be attending and participating in the Confidential Computing microconference.

  • openEuler SIG Gathering

  • openEuler Summit

  • China Lustre User Summit

  • Community Over Code Europe

  • Community Over Code North America

• Next meetings

  • At this time of the year we are usually discussing priorities for next year.

  • Next meeting would be on Thanksgiving in the USA. I am trying to get someone from Arm to talk about live migration on RME spec either the week before or after Thanksgiving. This will probably be our last meeting in the current format.

  • I will provide status update through e-mail in late December.

• AOB