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Linux 4.3 Advances SMP Load Balancing

  • November 3, 2015
  • By Sean Michael Kerner

Linus Torvalds released the Linux 4.3 kernel on Sunday November 1st after seven release candidates.

"So it *felt* like the last week of the rc series was busy, to the point where I got a bit worried about the release," Torvalds wrote in his release note message. " But doing the actual numbers shows that that really was just my subjective feeling, probably due to the kernel summit and travel back home from Korea."

Late changes in the kernel cycle included a whole bunch of networking updates.

The biggest user facing update in the Linux 4.3 release is the removal of the EXT3 fileystem, which was first announced in September when Linux 4.3 was released.

There is also a change to the Linux kernel scheduler.

"The biggest change in this cycle is the rewrite of the main SMP load balancing metric: the CPU load/utilization," Linux kernel developer, Ingo Molnar wrote in a Linux Kernel Mailing List message. "The main goal was to make the metric more precise and more representative

On the chip side, Linux 4.3 now supports Intel's Skylake architecture and an improved open-source Nvidia graphics driver.

"So on the whole, this remains a rather calm release cycle until the very end," Torvalds said. "And with the release of 4.3, obviously the merge window for 4.4 is open, and let's keep our fingers crossed that that will be an equally calm release. Especially since apparently Greg has decided ahead of time (as an experiment brought on by discussion at the kernel summit) that 4.4 will be another LTS release."

Sean Michael Kerner is a senior editor at LinuxPlanet and InternetNews.com. Follow him on Twitter @TechJournalist

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