Package: systemd Severity: wishlist Version: 242-7 Tags: patch I'd like to propose that we switch to cgroupv2 as the default configuration for the bullseye release. This has the potential to impact quite a few packages (notably, it breaks Docker today), so I don't think it can be done without engaging with a broader subsection of the developer community, but this seems like a reasonable place to start. By making this transition soon, I expect that we can iron out the issues well in advance of the bullseye release.
Detailed documentation of cgroupv2 can be found at https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html, with rationales and comparison against v1 documented under the "Issues with v1 and Rationales for v2" heading. >From systemd's perspective, the switch may be as simple as adding "-Ddefault-hierarchy=unified" to the configuration options in debian/rules. A minimal patch to implement this change is attached. Thanks noah
diff -ur systemd-242/debian/rules systemd-242-8~cgroupv2/debian/rules --- systemd-242/debian/rules 2019-09-04 17:34:17.000000000 +0000 +++ systemd-242-8~cgroupv2/debian/rules 2019-11-01 22:31:54.575052213 +0000 @@ -74,7 +74,8 @@ -Dnobody-group=nogroup \ -Dbump-proc-sys-fs-nr-open=false \ -Ddev-kvm-mode=0660 \ - -Dgroup-render-mode=0660 + -Dgroup-render-mode=0660 \ + -Ddefault-hierarchy=unified # resolved's DNSSEC support is still not mature enough, don't enable it by # default on stable Debian or any Ubuntu releases
