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Attendees

Present

  • David Rusling (Linaro)
  • Ilias Biris (Linaro)
  • Kate Stewart (Linaro)
  • Andrea Gallo (Linaro)
  • Leo Duran (AMD)
  • Kumar Sankaran (Applied Micro) * Jeff Underhill (ARM)
  • Venu Vadapalli (Broadcom)
  • Rob Herring (Calxeda)
  • Kiko (Canonical)
  • Prasun Kapoor (Cavium)
  • Stefano Stabellini (Citrix)
  • Tim Wesselman (HP)
  • Assaf Hoffman (Marvell)
  • Jon Masters (Red Hat)
  • Elsie Wahlig (Samsung)
  • Bill Mills (TI)

Guest

  • Mark Brown (Linaro)

Not present or late

  • George Grey (Linaro)
  • Joe Bates (Linaro)
  • Anmar Oueja (Linaro)
  • Vijay Rao (Facebook)
  • Xinwei Hu (Huawei)
  • Riccardo Ukmar (ST)

Introduction to Linaro Stable Kernel (Mark Brown)

Mark is a new Linaro employee but long time Linux developer: 15y debian developer, maintainer of a number of kernel subsystems, former wolfson engineer. WELCOME!!!

Mark is leading the Linaro Stable Kernel project:

  • take features that linaro is developing and integrate them upstream and in the LTS kernel by Greg KH
    • featurs will be developed by the kernel WG and other teams at linaro, then at some point the TSC will decide that such features need to be integrated in the stable kernel without waiting for the ongonig kernel in development to stabilise
  • which kernel version would be the most useful for LEG?
  • will LEG members consume LSK directly or will use only the kernel provided by distro vendors?
    • Rob: members will consume only the kernel by distro vendors
    • Stefano: true but there are many many distro vendors and we may assume that LTS is the common kernel for all distro vendors. Minor distro's follow what the major vendors
    • Jon: RH decided to base their RHEL on 2.6.32 and then LTS also independently got based on the same. So it is not necessarily true that distro vendors base their releases on Greg's LTS.
  • Bill: the stable kernel is much more important to the Android and open embeddded kind of distributions than the classical LEG case. There are multiple flavours: standard, android, real-time. Which one will Mark mantain?
    • Mark: produce a core stable kernel with as much as possible in it and then have multiple layers on top. E.g. the android patches would be an example, same the RT patches.

    • Bill: will there be also some linux-next kind of automatic build of those patches?
    • Mark: yes, already ongoing work to have this in LAVA
    • Jon: would like to have some starting point from Linaro, tested on many SoC's in Linaro and which lasts a bit longer than its kernel tip counterpart
  • Mark: interested in which platforms to be used for QA and which features, e.g. RT or virtualization
    • Bill: there is tip development, platform development and the verification cycle. How to determine what manages to get in or not in a given cycle?
    • Jon: Fedora consumes upstream only, Red Hat may want anyway something recent and with longer life cycle
    • Stefano: Citrix would see value in a stable kernel for security updates and fixes
  • Prasun: does Linaro have plans for LSK or waiting for the Linux Foundation stable releases?
    • Mark: currently tracking Greg KH but there is no reason not to change if needed
    • Prasun: if tracking the LF, then Linaro own LSK would be delayed each time by few months
    • Mark: it is true and this may be misaligned vs what Android may select.
    • Bill: from TI there is an interest to be aligned to Greg and the LTS. TI would like also to see some coordination with LTS and the RT patches
  • Mark: in addition to virtualization, any other feature?
    • Andrea: patches by LEG not upstream yet - eg hugepages or NUMA or UEFI support - are needed
  • agreed to reconvene in Dublin and discuss after Mark's session on LSK

Actions from previous meeting

#

Action

Owner

Status

Notes

1

request Linaro COO to review and sign Open-MPI contributor agreement then feedback to LEG-SC

Andrea

ON HOLD

2

Build OpenJDK plans at Linaro+RH

Andrea, Jon

OPEN

OpenJDK code will land this week. Andrew Haley and Ed Nevill have managed to make it run natively on the Foundation model already

3

organize a call to review feedback from Jon on all cards

Andrea

CLOSED

no more feedback, can be closed

4

check if the TPM table is a must-have, mainly for video DRM

Jeff

CLOSED

assume yes for TPM in general, regardless of video

5

organize a sync up call on uefi + acpi + kernel strategy

Andrea

CLOSED

Jon got the invite from Grant

Approve minutes from last meeting

No concern expressed, publish on the public wiki by e/o Friday.

Oracle Test Certification Kit agreement

Linaro signed the Oracle Contributor Agreement and got it executed on 8th April 2013.

Now need to access the Java Compatibility Kit already signed by Red Hat and others

No objection, approved.

Agenda and key sessions at Connect

  • LEG sessions

    • UEFI next steps
    • ACPI reference driver
    • OpenJDK
    • RAS Daemon
    • Kernel options for Enterprise
    • Assembly dependencies
  • LEG-SC (private sessions, not visible yet from the web site)
    • Engineering review, Monday 3pm-4pm
    • Benchmarking, Wednesday 3pm-4pm
    • wrap-up, Friday 2pm-3pm

Card review

Cards from previews meetings

  • Hugepages - ARMv7 / ARMv8

    • added STREAM and Sysbench performance results in the deliverable section
    • will discuss actual % improvements at card close-out
    • Approved
  • NUMA - ARMv7 / ARMv8

    • Kiko and Jon agreed to mark as low priority
    • Approved, move it to planning without fixVersion and do not start any engineering activity
    • Bill: even if approved, do not make it public until engineering starts, let's avoid exposing our weaknesses
    • Approved
  • Web front end stack - Benchmarking

    • no feedback received, could approve as is
    • suggest to dedicate one full session in Dublin
    • Approved
  • Openstack - CI bring up and testing - ARMv7

    • current scope covers building OpenStack and verifying it is stable including KVM tests

    • proposal is to approve current scope as Builds and Baselines task and create new cards for OpenStack performance evaluation in the future

      • Andrea has already triggered an email thread with a special interest group of LEG-SC representatives
    • Rob: ok to build in CI and identify all missing features. No real need for performance evaluation
    • Tim: ok to approve in builds and baselines

Delivered

Engineering report

Actions from this meeting

#

Action

Owner

Status

Notes

1

request Linaro COO to review and sign Open-MPI contributor agreement then feedback to LEG-SC

Andrea

ON HOLD

2

Build OpenJDK plans at Linaro+RH

Andrea, Jon

OPEN

OpenJDK code will land this week. Andrew Haley and Ed Nevill have managed to make it run natively on the Foundation model already

LEG-SC/2013-06-20 (last modified 2013-06-30 19:28:41)