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DragonFlyBSD 5.2.0

22 Aprile 2018

DragonFly BSD

DragonFly BSD

DragonFly è un sistema operativo designato per essere la logica continuazione sulla serie FreeBSD-4.x OS. DragonFly è un fork per dare a BSD l’oppurtunità di crescere in una nuova e diversa direzione rispetto alla serie FreeBSD-5.

Versione 5.2.0

Questa versione contiene(in Inglese):

DragonFly version 5.2 brings Meltdown/Spectre mitigation, significant improvements to HAMMER2, ipfw, and graphics acceleration.

The details of all commits between the 5.0 and 5.2 branches are available in the associated commit messages for 5.2.0rc and 5.2.0.

Big-ticket items

Meltdown and Spectre mitigation support

  • Meltdown isolation and spectre mitigation support added. Meltdown mitigation is automatically enabled for all Intel cpus. Spectre mitigation must be enabled manually via sysctl if desired, using sysctls machdep.spectre_mitigation and machdep.meltdown_mitigation.


  • H2 has received a very large number of bug fixes and performance improvements. We can now recommend H2 as the default root filesystem in non-clustered mode.
  • Clustered support is not yet available.

ipfw Updates

  • Implement state based “redirect”, i.e. without using libalias.
  • ipfw now supports all possible ICMP types.
  • Fix ICMP_MAXTYPE assumptions (now 40 as of this release).

Improved graphics support

  • The drm/i915 kernel driver has been updated to support Intel Coffeelake GPUs
  • Add 24-bit pixel format support to the EFI frame buffer code.
  • Significantly improve fbio support for the “scfb” XOrg driver. This allows EFI frame buffers to be used by X in situations where we do not otherwise support the GPU.
  • Partly implement the FBIO_BLANK ioctl for display powersaving.
  • Syscons waits for drm modesetting at appropriate places, avoiding races.


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Il sito web della distribuzione è:


Dragonflybsd 4.2

Dragonflybsd 4.2


Si può aggiornare dal ramo 4.8.x, ma perstaer attenzione alle chiavi pubbliche/private di SSH.


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