Merge pull request #120077 from tzneal/revert-oom-serial

Revert "mark the OOM killer as serial to reduce flakes"

test/e2e_node/oomkiller_linux_test.go

@@ -37,10 +37,7 @@ type testCase struct {
 	oomTargetContainerName string
 }
 
-// Marked as [Serial] since currently the runtime can miss the OOM event if the pod is killed too quickly. This seems
-// to occur more often when the node is highly loaded.
-
-var _ = SIGDescribe("OOMKiller [LinuxOnly] [NodeConformance] [Serial]", func() {
+var _ = SIGDescribe("OOMKiller [LinuxOnly] [NodeConformance]", func() {
 	f := framework.NewDefaultFramework("oomkiller-test")
 	f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged