On 01/22/2016 02:34 PM, Grygorii Strashko wrote: >> Do you still see it with the missing lazy bits? I don't see where this >> could come from. >> > > yep. I've tried it with and without changing _TIF_WORK_MASK > Seems It's triggered by Virtual terminal keyboard_tasklet
Just bootet my current v4.4 to cross check what you see and I have this: [ 3.808273] clocksource: Switched to clocksource arch_sys_counter [ 3.851193] keyboard: kbd_init(1609) [ 3.861903] keyboard: kbd_bh(1201) [ 3.868322] keyboard: kbd_init(1612) [ 3.868581] NET: Registered protocol family 2 So. No backtrace here. According to the full dmesg I should have all CPUs up by now. kbd_bh is comming from ksoftirqd as well. No idea why you see this. There is a irq off region which sets and removes RUN bit, I have no idea why you have this backtrace. Sebastian
