tests: Add a separate simpler MD activation test case

tests/mdraid_test.py

@@ -202,6 +202,25 @@ def test_create_with_chunk_size(self):
 
 class MDTestActivateDeactivate(MDTestCase):
     @tag_test(TestTags.SLOW, TestTags.CORE)
+    def test_activate_deactivate_core(self):
+        """Verify that it is possible to activate and deactivate an MD RAID"""
+
+        succ = BlockDev.md_create("bd_test_md", "raid0",
+                                    [self.loop_devs[0], self.loop_devs[1]],
+                                    0, None, None)
+        self.assertTrue(succ)
+
+        succ = BlockDev.md_deactivate("bd_test_md")
+        self.assertTrue(succ)
+
+        succ = BlockDev.md_activate("bd_test_md",
+                                    [self.loop_devs[0], self.loop_devs[1]], None)
+        self.assertTrue(succ)
+
+        succ = BlockDev.md_deactivate("bd_test_md")
+        self.assertTrue(succ)
+
+    @tag_test(TestTags.SLOW, TestTags.CORE, TestTags.UNSTABLE)
     def test_activate_deactivate(self):
         """Verify that it is possible to activate and deactivate an MD RAID"""
 

tests/skip.yml

@@ -76,3 +76,9 @@
     - distro: "centos"
       version: ["9", "10"]
       reason: "Race condition in denominate with latest mdadm v4.4"
+
+- test: mdraid_test.MDTestActivateDeactivate
+  skip_on:
+    - distro: "centos"
+      version: "9"
+      reason: "Race condition in activate-deactivate test with latest kernel. RHEL-126233"