On Mon, Sep 21, 2020 at 11:21:54AM +0200, Daniel Vetter wrote: > So question to rt/worker folks: What's the best way to let userspace set > the scheduling mode and priorities of things the kernel does on its > behalf? Surely we're not the first ones where if userspace runs with some > rt priority it'll starve out the kernel workers that it needs. Hardcoding > something behind a subsystem ioctl (which just means every time userspace > changes what it does, we need a new such flag or mode) can't be the right > thing. > > Peter, Tejun? So regular workqueues do not support RT priorities, but you can set their nice value somewhere in /sys. The kthread_work stuff used in these patches result in a regular kthread and as such the user interface for changing its scheduling class or priority is that of any other 'random' task.
