* Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> [180718 14:54]: > On Wed, 2018-05-23 at 11:00 -0700, Tony Lindgren wrote: > > I thought you said earlier the issue was that you wanted to keep > > the console enabled all the time and never idle? > > Yes, for kernel console. > To be clear, if user supplies "console=ttySx" it keeps powered on > always. But if there is no such parameter, we are fine with RPM. I'm fine with that as long as we have a way to detach or disable kernel console from userspace after booting so the console uart can idle. > Letting kernel console do power management on the systems without > irq_safe hack is dangerous in terms of loosing important data (crash, or > some other stuff which needs atomic context: kgdb?). Yes in the long run we should get rid of all pm_runtime_irq_safe() use. It increases the parent dev PM runtime usage count permanently blocking the whole domain from idling. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
