Create a sane desktop linux configuration about oomd

[danobi]

Linux 4.20 got packaged for arch linux and I think systemd is prepping a v240 release. I'm going to start working on this again since we are unblocked.

[danobi]

First I had to turn on systemd's cgroup2 only support by adding systemd.unified_cgroup_hierarchy to my kernel boot options.

[danobi]

We're missing a couple of pieces for this to happen:

• systemd has a cgroup2 bug: systemd/systemd#10876 . It's since been fixed but I don't believe the patch has made its way into a release yet
• Linux 4.20 contains the PSI patches. That also has not been released.

Note that these are both out of my control, so expect more progress here in a couple of weeks.

[danobi]

#40 should be valid, but is untested on my home machine. (It has been tested on developer machines at FB, though, with minor modifications).

[Hyperion101010]

so will that patch , eliminate this bug ?

[nomego]

Ok so the systemd boot option is needed, what's the effect of the cgroup2 bug and how do we now when it's a release?
Are the PSI patches merged and available in an 4.20 RC ?

[danobi]

@nomego IIRC, the systemd bug resulted in the memory controller not being delegated to cgroups in user.slice. The bug doesn't happen all the time but it happened often enough at FB.

The PSI patches have been merged and I do believe they're in 4.20 RC.

[hammerandtongs]

I added #46 which seems relevant to this tracking bug.

Looking forward to oomd being ready for desktop, thanks for this work!

[danobi]

8d21de7 has a basic systemd configureation