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Monday, April 4 • 10:40am - 11:30am
Digitalization of Kernel Diversion from the Upstream - Hisao Munakata, Renesas Electronics

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In 2011 the LTSI-project was launched to identify and reduce duplicate work being done by vendors. We are now 4.5 years into the process and we wanted to see how well we are doing and specifically have the following questions answered:

  • are we closer to mainline (Linus' repository) than before?
  • are patches actively upstreamed and do they reach Linus' repository?
  • what are the closest repositories and revisions?
  • is upstreaming consistent, or are we merging code dumps and then diverging again?

To answer these questions we enhanced the techniques powering the original Yaminabe project (the research that prompted us to start LTSI). These new methods allow us to make comparisons of source code to a Git forest (all branches in many Git trees).

In this talk we will explain the techniques that are used, the design decisions that we made and results we obtained using these methods and what they mean and (hopefully) answer the questions that we asked ourselves.

avatar for Hisao Munakata

Hisao Munakata

Senior Director, Renesas Electronics Corp
Munakata is an Advisory Board member of AGL, and board of director of Linux Foundation. He has been working for embedded Linux development including upstreaming, BSP development and customer support for over 20 years. Also, talked at many Linux Foundation events and other opportunities... Read More →

Monday April 4, 2016 10:40am - 11:30am PDT
Harbor Ballroom I