[linux-audio-user] Realtime on 2.6.12 again

Hi, recently I managed to get a latency of about 16msecs on my USB device thanks to helpful people on this list (you know who you are ;-). Thihs is much better than the 48msecs I got before. I still wonder and am trying to get even less latency without xruns. Before, I used a vanilla 2.6.10 with the RT-LSM-patch applied. Meanwhile I installed a 2.6.12 with the preempt patch of INgo Molnar. Unfortunately, it didn't get better results concerning latency on my usb audio device. So I'd like to know some things: * Does a 2.6.12 with Ingo's patch require further system setup to get lower latencies, or * Should I apply futher patches and if which ones (RT-LSM has been dropped)? * What system tweaking is needed to get less latencies? Any wee small hint is much appreciated. Thanks & best regards ce