Linaro Releases

The Linaro Networking Group (LNG) is pleased to announce the
2015.03 release of the Linaro Networking Kernel.

Interesting changes include:

• Updated both kernel branches to be based on the February 2015 release of
  • Linaro Standard Kernel v3.14 and v3.14-rt, respectively.

• Changed preemption model for linux-linaro-lng-v3.14 branch
  • from PREEMPT_NONE (server model – no preemption)
  • to PREEMPTION (low latency desktop model – most preemption possible w/o RT).

• Enabled use of threaded Interrup Service Routines (ISRs) by default,
  • with no need to enable this explicitly via boot-time kernel command line.

• Added temporary fixes for several compilation / linker errors when building
  • for x86 and x86_64 architectures.

The release is also available via tags in the LNG git repository:

git://git.linaro.org/kernel/linux-linaro-lng.git linux-lng-3.14.32-2015.03
git://git.linaro.org/kernel/linux-linaro-lng.git linux-lng-preempt-rt-3.14.32-2015.03

More information on Linaro Networking Group Kernels is available at
http://wiki.linaro.org/LNG/Engineering/Foundational

Fixed in this release

• LBTS: #340 ARMV8 support not yet working in 3.14 kernel

• LBTS: #89 no_hz_full : isolation breaks on x86

Known issues

NO_HZ_FULL isolation in RT kernel temporarily broken due to upstream reversion
of a required patch due to problems that patch was creating elsewhere.
Expect a solution for this from upstream in time for next month’s release.

Feedback and Support

Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development.

• Linaro Networking Development mailing list
• Linaro Networking IRC channel on irc.freenode.net at #linaro-networking

• Bug reports should be filed in the Linaro Bug Tracking System against “LNG Kernel” product and “General” component: https://bugs.linaro.org
• Questions? ask Linaro.
• Interested in commercial support? inquire at Linaro support