Re: BUG-RT: scheduling while in atomic in the watchdog's hrtimer

[Peter Zijlstra]

On Thu, Mar 21, 2019 at 10:27:30PM +0100, Daniel Bristot de Oliveira wrote:
> Hi,
> 
> In the 4.19/5.0-rt configured !SMP, the following chain of events can
> take place:
> 
> ------------------------------ %< -------------------------------------
> smp_apic_timer_interrupt(){
>       hrtimer_interrupt() {
>               __hrtimer_run_queues() {
>                       watchdog_timer_fn() {
>                               stop_one_cpu_nowait() {
>                                       #ifdef !CONFIG_SMP

ARGGHH..