Kernel development

Kernel release status

The current 2.6 development kernel is 2.6.27-rc6, released on September 9.

There have been numerous fixes merged into the mainline since 2.6.27-rc6, but with many kernel hackers including Linus off at the Kernel Summit, that may delay -rc7 somewhat.

No stable kernel releases have been made over the last week. 2.6.26.5 and 2.6.25.17 were both released September 7.

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The 2008 Linux Kernel Summit

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Day 1

The sessions held on the first day were:

• Linux 3.0: should the developers do a Linux 3.0 release with a focus on dumping older, unneeded code?

• Minisummit reports: reports from gatherings of power management, wireless networking, and containers developers.

• When should drivers be merged? A wide-ranging discussion on the trade-offs between getting drivers into the kernel quickly and waiting until they are up to kernel coding standards.

• Filesystem and block layer interaction; what contemporary file systems need to be able to get the most out of storage devices.

• Cross-subsystem issues; how do we evolve subsystems which are heavily used by several other parts of the kernel?

• Tools, and the new Patchwork tool in particular.

• Bootstrap code. Why does every distributor throw together its own initrd/initramfs code, and can that situation be improved?

• Kernel quality and release process, various discussions on how to produce better kernels and a near-decision to move to a one-week merge window.

Day 2

• Tracing. A lengthy discussion on user requirements for kernel tracing and how those requirements might eventually be met.

• Documentation. We always want more and better documentation, but what documentation would be most useful to the development community?

• There was a brief bug-fixing session aimed at the top entries on the KernelOops.org. Over the course of half an hour, the developers were able to fix 13 of the top 14 bugs. It was widely agreed that this was a productive use of time which will probably be repeated at future events.

• More minisummit reports covering virtualization, networking, and kernel bloat.

• All about threads; kernel thread pools and threaded interrupt handlers in particular.

• Projects with large user-space components; how can we make it easier for the direct rendering infrastructure project to work with the mainline kernel?

• Rafael Wysocki led a section on the new suspend/resume infrastructure. Most of that talk was concerned with the API, which was covered here back in March, so it will not be written up again now. Some changes will likely be made; stay tuned to LWN for the details.

  Linus did ask the crowd how many people were still unable to suspend their laptops. The number of hands raised was quite small; things have clearly gotten better in this area.

• Fixing the Kernel Janitors Project. How can we do a better job of bringing new developers into the kernel community?

The closing party (which was also the Linux Plumbers Conference opening party) was the venue chosen for the annual election of members to the Linux Foundation's Technical Advisory Board. The move out of the regular kernel summit sessions was intended to allow a wider group of people to participate in the election. It would appear to have been successful in that regard; there were record numbers of both candidates and voters. The board members elected this time around were James Bottomley, Kristen Carlson Accardi, Chris Mason, Dave Jones, Chris Wright, and Christoph Hellwig. Christoph was elected to a one-year term; all of the others will serve two-year terms.

Next year's kernel summit is currently scheduled for October 18 to 20 in Tokyo, Japan.

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