On 2022-02-10 15:05:24 [+0100], Krzysztof Kozlowski wrote: > On 10/02/2022 14:47, Sebastian Andrzej Siewior wrote: > > On 2022-02-10 09:33:56 [+0100], Krzysztof Kozlowski wrote: > >> The PREEMPT_RT patchset does not use soft IRQs thus trying to filter for > >> do_softirq fails for such kernel: > > > > PREEMPT_RT does use soft IRQs. > > Correct. It does not use do_softirq() code, but follows different path > with ksoftirqd. > Shall I rephrase it towards something like this? Or maybe you have some > more accurate description? It would be good to describe what the purpose of the change in terms of the actual problem and the aimed solution. > The implementation detail is that do_softirq() is in ifndef. So let me ask again. We have FUNC1="schedule" FUNC2="do_softirq" What is the purpose of this? Do you need FUNC2 when ksoftirqd is run or when softirqs are served? Not sure how scheduler_tick fits in all this. > Best regards, > Krzysztof Sebastian
