OpenBSD 6.5 release, Unix-like operating system

openbsd disable Hyper-Threading

OpenBSD is a derived from NetBSD Unix-like operating system. Project leader Theo de Raadt launched an OpenBSD project in 1995 to create a secure operating system, and OpenBSD is also known for its high-quality documentation, open source, and strict software licensing.

openbsd disable Hyper-Threading

Changelog v6.5

  • Improved hardware support, including:
    • clang(1) is now provided on mips64.
    • The default linker has been switched from the binutils bfd-based linker to lld on amd64 and i386.
    • octeon: Now the system automatically detects the number of available cores. However, manual setting of the numcores, or coremask, boot parameter is still needed to enable secondary cores.
    • octeon: It is now possible to use the root disk’s DUID as the value of the rootdev boot parameter.
    • New octgpio(4) driver for the OCTEON GPIO controller.
    • New pvclock(4) driver for KVM paravirtual clock.
    • New ixl(4) driver for Intel Ethernet 700 series controller devices.
    • New abcrtc(4) driver for Abracon AB1805 real-time clock.
    • New imxsrc(4) driver for i.MX system reset controller.
    • New uxrcom(4) driver for Exar XR21V1410 USB serial adapters.
    • New mvgicp(4) driver for Marvell ARMADA 7K/8K GICP controller.
    • Support for QCA AR816x/AR817x in alc(4).
    • Support for isochronous transfers in xhci(4).
    • uaudio(4) has been replaced by a new driver which supports USB audio class v2.0.
    • Improved support for nmea(4) devices, providing altitude and ground speed values as sensors.
  • IEEE 802.11 wireless stack improvements:
    • Reduced usage of RTS frames improves overall throughput and latency.
    • Improved transmit rate selection in the iwm(4) driver.
    • Improved radio hardware calibration in the athn(4) driver.
    • The bwfm(4) driver now provides more accurate device configuration information to userland.
    • Added new routing socket message RTM_80211INFO to provide details of 802.11 interface state changes to dhclient(8) and route(8).
    • If an auto-join list is configured, wireless interfaces will no longer connect to unknown open networks by default. This behaviour must now be explicitly enabled by adding the empty network name to the auto-join list, e.g. ifconfig iwm0 join "", or join "" in hostname.if files.
    • The iwn(4) and iwm(4) drivers will now automatically try to connect to a network if the radio kill switch is toggled to allow radio transmissions while the interface is marked UP.
  • More