2.6.38-10-generic is a kernel. The 2.6.38-10-generic has been tested via the Phoronix Test Suite in the configurations listed below.
hdparm-read-sdc - Tests on Ubuntu 10.04, Intel Core 2 Quad Q9550, GeForce 9300, ASUS P5N7A-VM
compbench - Tests on Ubuntu 10.04, Intel Core 2 Quad Q9550, GeForce 9300, ASUS P5N7A-VM