[Feature Request] Add support for mainline kernel (Xanmod-Edge for example)

[gabriele2000]

Basically I use linux-xanmod-edge and when I type system76-scheduler daemon the result is Error: kernel does not support tweaking the scheduler.

As far as I understand, so far it's useless for now with xanmod, right?

[mmstick]

Xanmod isn't a mainline kernel, and it doesn't support the CFS tweaking feature. This message is warning about that feature not being supported by the kernel.

[gabriele2000]

So should I propose a change?

Xanmod isn't a mainline kernel

That's new, since the edge branch it not the "tt" branch (TaskType scheduler)

[xanmod]

The xanmod's cfs sysctl parameters are the same as mainlline, only the energy efficiency functions have been removed.
xanmod/linux@12cf86a

[mmstick]

@xanmod This CFS tweaking functionality here fails when it can't find /sys/kernel/debug/sched/latency_ns and associated paths. The kernel files tweaked are found here: https://github.com/pop-os/system76-scheduler/blob/master/daemon/src/paths.rs#L25

[xanmod]

system76-scheduler/daemon/src/paths.rs

Line 7 in c103229

pub const PREEMPT_PATH: &str = "/sys/kernel/debug/sched/preempt";

# CONFIG_PREEMPT_DYNAMIC is not set
In xanmod config it is not possible to change via debugfs.

Enabling preempt_dynamic in recent versions of linux forces the kernel to work in preempt and not preempt_voluntary as we wish. For this reason it is disabled.