**Overall Performance** - DragonFly now offers significant performance gains over previous releases, especially for machines using AHCI or implementing swapcache(8).
+**ACPI Support** - Major update to DragonFly's ACPI support have been made, particularly for interrupt routing.
+
## Availability
Three release options are now available for 32-bit as well as for 64-bit. 64-bit installations are recommended if you do not need the linux emulation layer.
* ACPI - tons of work has gone into our ACPI support.
* APIC_IO now acts as a default and can be changed in /boot/loader.conf
* Overhaul LWKT scheduler for MP performance.
- * Numerous bug fixes to HAMMER.
+ * Significant HAMMER bug fixes and performance improvements.
* HAMMER enhancements to allow swapcache to more easily cache file data via vfs.hammer.double_buffer mode.
* HAMMER double_buffer mode's strategy code is now asynchronous.
* CAM tag reservation code fixed for AHCI and SILI drivers.
* Use blocking mbufs in TAP/TUN to avoid unnecessary packet loss.
* Fixed a few difficult-to-reproduce bugs in the VM system
* Major timer functionality changes, the 8254 will no longer be used unless there is no other choice.
+ * Jump page support added to the mbuf API and used in several WIFI drivers.
+ * Fix bugs in ktrace related to the MP work which could freeze the system.
+ * LWKT thread migration code redone.
+ * The FAIRQ altq has been significantly enhanced and now supports weighted expansion of bandwidths up to the interface bandwidth.
+ * Lots of MP-related bug fixes to the network stack.
> ### Hardware changes (non-networking)
* mfi(4) RAID driver and mfiutil(8) configuration tool added.
* Numerous scheduler and memory management changes to improve MP performance.
> ### Userland changes
+ * The installer now allows you to crypt swap and root
* libcrypt now supports sha256/512
* The default password hash is now sha256
* dmsetup now supports remove_all