Re: [PATCH v4 1/1] Documentation: real-time: Add kernel configuration guide

[Steven Rostedt]

On Tue, 21 Jul 2026 16:36:06 +0200
Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote:

> > Unfortunately, debugfs is needed to configure the fair deadline server:
> > 
> >     /sys/kernel/debug/sched/fair_server/cpu*/runtime  
> 
> So drop the reference to it. It is not "bad" to have it enabled. It is

I believe that some distros feel that it is bad to enable because there's
no real auditing of its interface. Although, it is now only accessible by
root.

> just an interface to other things. Same as sysfs except that debugfs has
> no stable ABI unlike sysfs.

I found out the hard way that it can most definitely be a stable ABI :-p

-- Steve