On 15/06/2021 17.33, Steven Rostedt wrote: > On Tue, 15 Jun 2021 14:35:27 +0200 > Rasmus Villemoes <rasmus.villemoes@xxxxxxxxx> wrote: > >> Reverting commit 3d5bfbd9716318b1ca5c38488aa69f64d38a9aa5 (gpio: >> mpc8xxx: change the gpio interrupt flags.) makes it go away, as does >> disabling CONFIG_PREEMPT_RT or simply booting a vanilla v5.10.42 (where >> that option exists but cannot be selected). > > I'm curious if it will also trigger on vanilla v5.10.42 but add to the > kernel command line: threadirqs > > Make sure you have CONFIG_IRQ_FORCED_THREADING set too. > > Because it appears to be an issue with that being called by the generic > threaded irq infrastructure, which PREEMPT_RT enables automatically. It doesn't: ~ # uname -r 5.10.42-00001-g10216cf63a12 ~ # grep -ow threadirqs /proc/cmdline threadirqs ~ # zcat /proc/config.gz | grep FORCED_THREADING CONFIG_IRQ_FORCED_THREADING=y ~ # dmesg | grep WARNING ~ # (the one patch on top of 5.10.42 is a fixup of ls1021a.dtsi that I should get upstream some day, but not something that should affect this issue in any way). Thanks for the suggestion. Rasmus
