DragonFly BSD's Virtual Pace
DragonFly BSD continues its evolution with version 1.8, almost four years after being forked from the FreeBSD 4.x code base. New kernel virtualization features top a long list of system improvements over version 1.6, as the operating system looks ahead to broader commercial adoption.
Most notable on the new feature list is the addition of virtual kernel support for the DragonFly BSD kernel. The virtual kernel allows for a "system-in-a-box" running as a userland process. But virtual kernel support is different things to different people, said DragonFly BSD Project Leader Matthew Dillon. "Its uses are approximately the same uses that UML [User Mode Linux] is to Linux.
UML and virtual kernel support is used to create compartmentalized whole-system environments and to greatly ease the development of kernel code by reducing the engineering-test cycle time. Dillon noted that DragonFly BSD will use virtual kernel support primarily for reducing the engineering-test cycle time.
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