Hi Carsten, I tried to disable CONFIG_RT_GROUP_SCHED, but I still got cpu stalls! Is there a recommended config for the RT patch? kernel msg attached, it looks like that the stall occurred at the same place "menu_select" Thanks, Dong On 7/4/12 6:52 PM, Carsten Emde wrote: > Dong Liu, > >> [..] >> BUG: soft lockup - CPU#0 stuck for 279s! [swapper/0:0] > Just a wild guess: Please check your configuration for > CONFIG_RT_GROUP_SCHED=y. Is it there? If so, disable it and try whether > this solves your problem. > > -Carsten.