# DragonFly Release 2.2 - 17 February 2009
The DragonFly 2.2 release is here! The HAMMER filesystem is considered production-ready in this release; It was first released in July 2008. The 2.2 release represents major stability improvements across the board, new drivers, much better pkgsrc support and integration, and a brand new release infrastructure with multiple target options.
Three release options are now available: Our bare-bones CD ISO, a DVD ISO which includes a fully operational X environment, and a bare-bones bootable USB disk-key image (less than 512M).
## Availability
The release ISO images should be available on most of the [[mirrors|mirrors]]. If the ISO is not available on a certain mirror, please try another one or download it from the DragonFly FTP server.
### MD5 sums
* MD5 (dfly-2.2.0_REL.iso) = 3b8c2bba722db02eac76776fe40f3632
* MD5 (dfly-gui-2.2.0_REL.iso) = 69ad64019ab28010d38cef7a90f0185e
* MD5 (dfly-img-2.2.0_REL.img) = 06c5850ab4c9ca3c19e6b993b7ac32b4
* MD5 (dfly-2.2.0_REL.iso.gz) = 159765a8fd685b6104455dd0a167bc2b
* MD5 (dfly-gui-2.2.0_REL.iso.gz) = 08699d909e41b7b1e9184ef8242e0615
* MD5 (dfly-img-2.2.0_REL.img.gz) = 390068595ed08fb9021c123915d66d79
### pkgsrc packages
We offer over 7300 pre-built [pkgsrc](http://www.pkgsrc.org) packages for this release. The [pkg_radd(1)](http://leaf.dragonflybsd.org/cgi/web-man?command=pkg_radd§ion=ANY) utility may be used to download pre-built binary packages. By default this script will query the main package site for a random redirect to one of our mirrors. The path can be overridden by setting BINPKG_SITES in /etc/settings.conf.
To get a list of all packages, let [pkg_search(1)](http://leaf.dragonflybsd.org/cgi/web-man?command=pkg_search§ion=ANY) download the summary file for that release:
# pkg_search -d
## DragonFly 2.2.0 Release Notes
### Release Improvements
* A new DVD ISO release image is now available, in addition to the CD release.
* The new DVD release has a full X environment ready-to-go and many packages pre-installed.
* A full pkgsrc tar is now available on the CD/DVD in /usr.
* Full sources tar now available on the DVD (kernel sources only on the CD), in /usr.
* The nrelease build now trivializes package selection for people creating customized releases.
* The installer is now able to create a HAMMER filesystem setup.
### Kernel changes
* First step towards AMD64 support (done by Jordan Gordeev during the Google Summer of Code 2008).
* The system control *intr_mpsafe* is enabled by default.
* Move /kernel to /boot/kernel and /modules to /boot/modules.
* Add RFC3542 support (done by Dashu Huang during the Google Summer of Code 2008).
* Add HW checksum support to the loopback interface, which doubles performance.
* acpi_cpu(4) update. It's now possible to use higher (lower power usage) C states than C1 in modern (multicore) CPUs.
* First steps to use network threads without the Big Giant Lock (this feature is considered experimental).
* Fixed CVE-2008-2476 IPv6 security issue with modified patches from NetBSD.
* bridge_input works now in parallel.
* Fix bugs in dealing with low-memory situations when the system has run out of swap or has no swap.
* Major rewrite of usched_bsd4 and related support logic, plus additional improvements to the LWKT scheduler.
* Major revamping of the pageout and low-memory handling code.
* suser_* replaced with priv_* implementation from FreeBSD.
#### HAMMER changes
* HAMMER is now considered production-capable. Many bug fixes and other improvements have been made.
* It is now possible to boot from a HAMMER-only disk. No need for a single UFS partition for /boot. However, for production systems we still recommend a small UFS /boot followed by swap followed by one large HAMMER partition.
* Add HAMMER read support to the boot loader.
* Now uses per-mount kmalloc pools for bulk data structures, particularly for inodes and records.
### Hardware changes
* Add ACPI support module for IBM/Lenovo Thinkpad laptops (from FreeBSD).
* Add ACPI support module Asus laptops (from FreeBSD).
* Add acpi_video(4) - a driver for ACPI video extensions (from FreeBSD).
* It is possible to power down PCI devices during detach. This should save some power when using mobile devices (from FreeBSD).
* Update acpi_battery(4) related code to the latest one from FreeBSD HEAD.
* Correctly handle Intel G33 chips and add support for G45 chips to the agp(4) driver (from FreeBSD).
* Fixed CVE-2008-3831. Affects the Intel G33 series and newer only.
* Sync ciss(4) with FreeBSD's RELENG_4 branch.
* Sync iir(4) with FreeBSD. This fixes disk recognition with the Intel RAID Controller SRCU42L.
#### Networking
* Add support for cards with "RealTek 8102EL PCIe 10/100baseTX" chipset.
* Add poling support for jme(4).
* Add driver for Attansic PHYs (from FreeBSD).
* Add ale(4) for Atheros AR8121/AR8113/AR8114 PCIe ethernet controller (from FreeBSD).
* Add age(4) for Attansic/Atheros L1 gigabit ethernet controller (from FreeBSD).
### Userland changes
* The DragonFly source repositories are now maintained with [git](http://git.or.cz/) instead of CVS. See [development(7)](http://leaf.dragonflybsd.org/cgi/web-man?command=development§ion=ANY) for instructions how to clone the repository.
* A lot of man pages were updated due to the switch to git.
* Add LiveDVD support to our nrelease framework. (done by Louisa Luciani during the Google Summer of Code 2008).
* Enhance the DragonFly Mail Agent (done by Max Lindner during the Google Summer of Code 2008).
* Add a new multi-player terminal game: hunt.
* Bring in the devinfo(3) library and devinfo(8) utility from FreeBSD. The utility and library can be used to view the internal device hierarchy.
* Add devctl(4) and devd(8) from FreeBSD and enable related support in acpi_thinkpad(4).
* Update sensorsd(8) to the latest version from OpenBSD (October 2008).
* Sync libc/stdtime and zdump(8)/zic(8) with tzcode2008h from elsie.
* Symlink /dev/dsp to /dev/audio to preserve compatibility with older programs (all pkgsrc apps by default up to 2008Q3).
* A new daily periodic script cleans up all HAMMER volumes at night.
* Sync libusbhid with other BSDs. Sync usbhidctl with FreeBSD.
* Add ftw(), nftw(), associated header files and documentation.
* Fixed hundreds of warnings in various userland tools.
* i486 is now the default architecture for gcc(1).
* dntpd: Can now connect to NTP servers with IPv6 addresses.
* dntpd: Fix hang in dntpd startup when network down.
* Use BIND's resolver in libc.
* Add nsswitch.conf(5) support and add the Name Service Cache Daemon nscd(8) from FreeBSD.
* Import several pam_* modules from FreeBSD.
* Several bugs in the installer were fixed.
* nrelease: Additional to the ISO generation, nrelease can now generate an USB stick image.
* nrelease: It is now possible to build chosen pkgsrc packages in a chroot.
* telnetd: filter potentially dangerous environment variables passed from telnet client.
### Removals
* Removed the ISC DHCP server and client. **NOTE**: If you install DragonFly 2.2 from the live CD, you already have a pkgsrc version of the DHCP server installed. If you update from a previous version, you have to install the pkgsrc version manually.
* Remove rexecd(8).
* Remove libskey(3), it is replaced by libopie.
* Remove ISA part of sr(4).
* Remove ISA network device cx(4).
### Contributed Software
* Bring in the privilege separation ready DHCP client from OpenBSD.
* Bring in pam_passwdqc from the Openwall project.
* Update OpenPAM to Hydrangea.
* Update OpenSSH to version 5.1p1.
* Update OpenSSL to version 0.9.8j.
* Sync zoneinfo database with tzdata2009b.