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The kernel column #95 by Jon Masters

Dec 28, 2010, 22:34 (0 Talkback[s])
(Other stories by Jon Masters)

"Jon Masters talks about features in the 2.6.37 Linux kernel and describes debugging a kernel problem using the Git bisection feature…

"We're now free of the Big Kernel Lock (in many configurations – it's a config option that will hide other not-yet-compatible options when used) and I have been running systems BKL-free for some time now. Arnd Bergman and others have done an excellent job to rid us of this last vestige of truly ancient non-scalable Linux and unless you need a V4L (Video-4-Linux – TV tuner, webcam etc) device, you can probably run BKL-free today too. It is hoped that V4L will be fixed soon, maybe in time for 2.6.37. You probably won't notice a huge performance benefit of running without the BKL unless you happen to have something more high end than a desktop, but it's still pretty cool to know that you could get higher performance if only you could afford to have a system with dozens of CPUs to take advantage of it."

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