Comment 4 for bug 311829

Linux 2.6.28 kernel adds...

* the first version of Ext4 as a stable filesystem

* the much-expected GPU memory manager which will be the foundation of a renewed graphic stack,

* support for Ultra Wide Band (Wireless USB, UWB-IP)

* memory management scalability and performance improvements

* a boot tracer

*disk shock protection

*the phonet network protocol

* support of SSD discard requests

* transparent proxy support

*several new network drivers

*controlable IO CPU affinity

* high-resolution poll()/select()

*support of a minimal "dummy" policy in SELinux

* tracing improvements

* x86 x2APIC support

* a fb driver for VIA UniChrome devices

* Mitac Mio A701 ARM-based smartphone support

*some new drivers

* improved device support

* many other small improvements and fixes

Source:
http://kernelnewbies.org/Linux_2_6_28