FreeBSD 9.2-RELEASE Release Notes
Release Highlights
The highlights in the 9.2-RELEASE include the following.
- 
The ZFS filesystem now supports TRIM when used on solid state drives. ZFS TRIM support is enabled by default. [r251419] The following tunables have been added: - 
vfs.zfs.trim.enabled: Enable ZFS TRIM
- 
vfs.zfs.trim.max_interval: Maximum interval in seconds between TRIM queue processing
- 
vfs.zfs.trim.timeout: Delay TRIMs by up to this many seconds
- 
vfs.zfs.trim.txg_delay: Delay TRIMs by up to this many TXGs
 
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- 
The firewire(4) drivers have been removed from the GENERIC kernel configuration for all architectures. [r246321] 
- 
The virtio(4) drivers have been added to the GENERIC kernel configuration for amd64 and i386 architectures. [r247306] 
- 
The ZFS filesystem now supports lz4 compression. [r247309] 
- 
OpenSSL has been updated to version 0.9.8y. [r248272] 
- 
The bsdinstall(8) installer now supports installation over HTTP. [r248313] 
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DTrace hooks have been enabled by default in the GENERIC kernel. [r249549] 
- 
DTrace has been updated to version 1.9.0. [r249856] 
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Sendmail has been updated to version 8.14.7. [r249865, r249866, r249867, r249875] 
- 
OpenSSH has been updated to version 6.2p2. [r251135] 
- 
Implement new rc.conf(5) syntax for hostapd(8). The new format is: ifconfig_wlanX="HOSTAP", whereXrepresents the wlan(4) interface. [r252748]
- 
Import unmapped I/O support from head/. [r251897]
- 
Add support for the Chelsio 40G T5. [r252495] 
- 
Add a tunable to increase the initial TCP congestion window from 4 segments to 10 segments. This tunable can be enabled by adding net.inet.tcp.experimental.initcwnd10=1to sysctl.conf(5). This tunable is turned off by default in FreeBSD 9.2-RELEASE. [r252789]
- 
Update the Intel e1000 driver. [r252899] 
- 
Add support for the HighPoint DC Series Data Center HBA (DC7280 and R750). [r252903] 
- 
Add service-specific setfib(1) support. This is enabled by setting: <name>_fibin rc.conf(5).[r253233]
- 
Remove ctl(4) from the GENERIC kernel configuration. [r253860] 
