2.6.39.4 is a kernel. The 2.6.39.4 has been tested via the Phoronix Test Suite in the configurations listed below.
stream-log - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
kai_compress-7zip - Tests on Ubuntu 11.04, ARMv7 rev 9, kai
testcahce - Tests on Ubuntu 11.04, ARMv7 rev 9, kai
1186-dram - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
stream0327 - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
E1198-cachebench - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
E1198-Ramspeed - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
E1198_encode-mp3 - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
E1198_compress-7zip - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
E1198_stream - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
E1198_stream - Tests on Ubuntu 11.04, ARMv7 rev 9, cardhu
test du jour - Tests on Ubuntu 10.04, Intel Atom 330, Intel 82945G, Intel D945GCLF2
bullet_all - Tests on Ubuntu 10.10, Ubuntu 10.04, ARMv7 rev 9, cardhu, Intel Xeon E31270, Matrox MGA G200eW WPCM450, Supermicro X9SCL
bullet_all - Tests on Ubuntu 10.10, Ubuntu 10.04, ARMv7 rev 9, cardhu, Intel Xeon E31270, Matrox MGA G200eW WPCM450, Supermicro X9SCL