From f4b59c74a799a27d74ea23aca4e61df787b80647 Mon Sep 17 00:00:00 2001 From: Peter Hunt Date: Tue, 12 May 2020 14:32:00 -0400 Subject: cgroup: skip unified if we are using v1 There exists a chance for a node to be booted in v1, but have reminents of v2. An example is this CRI-O ci run: https://deck-ci.apps.ci.l2s4.p1.openshiftapps.com/view/gcs/origin-federated-results/pr-logs/pull/cri-o_cri-o/3565/test_pull_request_crio_critest_fedora/11243/ We fail because we are incorrectly writing to the unified path, because we are v1. We should not write to the unified path if we are v1 Signed-off-by: Peter Hunt --- pkg/cgroups/cgroups.go | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/pkg/cgroups/cgroups.go b/pkg/cgroups/cgroups.go index d51905f4b..3b56f944f 100644 --- a/pkg/cgroups/cgroups.go +++ b/pkg/cgroups/cgroups.go @@ -517,6 +517,10 @@ func (c *CgroupControl) AddPid(pid int) error { } for _, n := range names { + // If we aren't using cgroup2, we won't write correctly to unified hierarchy + if !c.cgroup2 && n == "unified" { + continue + } p := filepath.Join(c.getCgroupv1Path(n), "tasks") if err := ioutil.WriteFile(p, pidString, 0644); err != nil { return errors.Wrapf(err, "write %s", p) -- cgit v1.2.3-54-g00ecf