Hi. I built the async branch of your tree and tested it, also running 2.6.33-rc1 + TuxOnIce for comparison. Dmesg for both are attached. Is there anything I can/should be doing for you on top of this? I'll try Dmitry's patch on top of this a little later - other things to do first. I noticed that you were doing standard deviations in your stats - how many runs were you basing them on? Not sure that I can be bothered to do too many - too much else to do! Regards, Nigel