On Tue, 30 Apr 2024 at 11:44, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > > On 2024-04-29 16:05:25 [+0200], Ulf Hansson wrote: > > The hierarchical PM domain topology and the corresponding domain-idle-states > > are currently disabled on a PREEMPT_RT based configuration. The main reason is > > because spinlocks are turned into sleepable locks on PREEMPT_RT, which means > > genpd and runtime PM can't be use in the atomic idle-path when > > selecting/entering an idle-state. > > > > For s2idle/s2ram this is an unnecessary limitation that this series intends to > > address. Note that, the support for cpuhotplug is left to future improvements. > > More information about this are available in the commit messages. > > > > I have tested this on a Dragonboard 410c. > > Have you tested this with PREEMPT_RT enabled and if so, which kernel? Yes, of course. :-) I should have mentioned this in the cover-letter, sorry. I have used the linux-rt-devel.git, which had a branch based upon v6.8-rc7 a while ago, that I used when I did my tests. The series needed a small rebase on top of my linux-pm tree [1], before I could post it though. I also tested the rebased series, but then of course then not with PREEMPT_RT, but to make sure there are no regressions. Kind regards Uffe [1] https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm.git next
