The interesting part, however, is that Sony Mobile is using a newer kernel (3.0.X) compared to the current kernel (2.6.35) in the existing Android 2.3.7 Xperia S firmware. The advantage of a newer kernel is the introduction of new features and optimisations. Earlier this year we questioned whether an updated linux kernel is planned post the ICS Xperia update. This now looks to be the case, at least for the newer 2012 Xperia smartphones.

來源:http://www.xperiablog.net/2012/04/07/xperia-s-android-ics-update-to-use-3-0-kernel/