On Mon, Jul 29, 2024 at 05:06:50PM +0200, Jerome Brunet wrote: > On Mon 29 Jul 2024 at 15:44, Mark Brown <broonie@xxxxxxxxxx> wrote: > > I don't recall this coming up much TBH. It may be that people just set > > raw spinlocks when they need it, or that there's not many people using > > relevant devices with RT kernels. > I have not been playing much with RT TBH, but AFAIK, with RT irq > handlers are threaded unless IRQF_NO_THREAD is set. In this case, > something preemptible in the handler should not be a problem. > The axg-fifo drivers do not have IRQF_NO_THREAD so something is a bit > unclear here. Yeah, it's definitely likely to happen all the time for people using RT with relevant devices. I'm not sure I have a good sense of if it's likely to be a nasty surprise to switch raw spinlocks on by default when it's currently controllable, I'd expect it'll generally be fine but it's possibly a bit rude to any users that don't use interrupts...
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