Xda-developer nobodyAtall has managed to do what no one else has done so far, booting a 3.0.8 kernel onto a 2011 Sony Xperia device. He posted a picture showing the 3.0.8 kernel booted on the Xperia mini. The latest official 2011 Sony Xperia kernel is version number 2.6.32.
nobodyAtall (nAa) says that apart from the fact that it boots, few other things are working right now. The kernel does appear to be stable and the drivers are now being ported one-by-one. The first device that will have this kernel is the Xperia mini, although there is no ETA on when it will be released.
The kernel is the piece of software that sits between the hardware and Android system. The advantage of sporting an updated kernel is new features and optimisations. The news gives hope that at some point it may appear on other 2011 Xperia devices, giving them a new lease of life.