Disable blkio test for older kernels

Signed-off-by: apostasie <spam_blackhole@farcloser.world>

Author: apostasie

cmd/nerdctl/container/container_run_cgroup_linux_test.go

@@ -484,6 +484,11 @@ func TestRunBlkioSettingCgroupV2(t *testing.T) {
 	testCase := nerdtest.Setup()
 	testCase.Require = nerdtest.Rootful
 
+	// See https://github.com/containerd/nerdctl/issues/4185
+	// It is unclear if this is truly a kernel version problem, a runc issue, or a distro (EL9) issue.
+	// For now, disable the test unless on a recent kernel.
+	testutil.RequireKernelVersion(t, ">= 6.0.0-0")
+
 	// Create dummy device path
 	dummyDev := "/dev/dummy-zero"
 

pkg/testutil/testutil.go

@@ -617,7 +617,9 @@ func RequireKernelVersion(t testing.TB, constraint string) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	unameR, err := semver.NewVersion(infoutil.UnameR())
+	// EL kernel versions are not semver, so, cleanup first
+	un := strings.Split(infoutil.UnameR(), "-")[0]
+	unameR, err := semver.NewVersion(un)
 	if err != nil {
 		t.Skip(err)
 	}