chore(ci/linux-4.14): stop testing host kernel 4.14

Kernel 4.14 has reached End of Life and is not supported by upstream.

This should also reduce our CI costs by 1/3.

Signed-off-by: Pablo Barbáchano <[email protected]>

Author: pb8o

.buildkite/common.py

@@ -23,7 +23,6 @@
 ]
 
 DEFAULT_PLATFORMS = [
-    ("al2", "linux_4.14"),
     ("al2", "linux_5.10"),
     ("al2023", "linux_6.1"),
 ]

tests/framework/artifacts.py

@@ -23,14 +23,7 @@ def select_supported_kernels():
     instance type.
     """
     hlv = packaging.version.parse(global_props.host_linux_version)
-    supported_kernels = [r"vmlinux-4.14.\d+"]
-    if (
-        global_props.cpu_model == "ARM_NEOVERSE_V1"
-        and global_props.host_linux_version == "4.14"
-    ):
-        supported_kernels.append(r"vmlinux-5.10-no-sve.bin")
-    else:
-        supported_kernels.append(r"vmlinux-5.10.\d+")
+    supported_kernels = [r"vmlinux-4.14.\d+", r"vmlinux-5.10.\d+"]
 
     # Booting with MPTable is deprecated but we still want to test
     # for it. Until we drop support for it we will be building a 5.10 guest

tests/framework/defs.py

@@ -30,7 +30,7 @@
 # Firecracker.
 MIN_KERNEL_VERSION_FOR_IO_URING = "5.10.51"
 
-SUPPORTED_HOST_KERNELS = ["4.14", "5.10", "6.1"]
+SUPPORTED_HOST_KERNELS = ["5.10", "6.1"]
 
 IMG_DIR = Path(DEFAULT_TEST_SESSION_ROOT_PATH) / "img"
 

tests/integration_tests/performance/test_huge_pages.py

@@ -55,10 +55,6 @@ def check_hugetlbfs_in_use(pid: int, allocation_name: str):
     assert kernel_page_size_kib > 4
 
 
-@pytest.mark.skipif(
-    global_props.host_linux_version == "4.14",
-    reason="MFD_HUGETLB | MFD_ALLOW_SEALING only supported on kernels >= 4.16",
-)
 def test_hugetlbfs_boot(uvm_plain):
     """Tests booting a microvm with guest memory backed by 2MB hugetlbfs pages"""
 
@@ -74,10 +70,6 @@ def test_hugetlbfs_boot(uvm_plain):
     )
 
 
-@pytest.mark.skipif(
-    global_props.host_linux_version == "4.14",
-    reason="MFD_HUGETLB | MFD_ALLOW_SEALING only supported on kernels >= 4.16",
-)
 def test_hugetlbfs_snapshot(
     microvm_factory, guest_kernel_linux_5_10, rootfs_ubuntu_22, uffd_handler_paths
 ):
@@ -115,10 +107,6 @@ def test_hugetlbfs_snapshot(
     check_hugetlbfs_in_use(vm.firecracker_pid, "/anon_hugepage")
 
 
-@pytest.mark.skipif(
-    global_props.host_linux_version == "4.14",
-    reason="MFD_HUGETLB | MFD_ALLOW_SEALING only supported on kernels >= 4.16",
-)
 def test_hugetlbfs_diff_snapshot(microvm_factory, uvm_plain, uffd_handler_paths):
     """
     Test hugetlbfs differential snapshot support.
@@ -166,10 +154,6 @@ def test_hugetlbfs_diff_snapshot(microvm_factory, uvm_plain, uffd_handler_paths)
     vm.wait_for_up()
 
 
-@pytest.mark.skipif(
-    global_props.host_linux_version == "4.14",
-    reason="MFD_HUGETLB | MFD_ALLOW_SEALING only supported on kernels >= 4.16",
-)
 @pytest.mark.parametrize("huge_pages", HugePagesConfig)
 def test_ept_violation_count(
     microvm_factory,
@@ -256,10 +240,6 @@ def test_ept_violation_count(
     metrics.put_metric(metric, int(metric_value), "Count")
 
 
-@pytest.mark.skipif(
-    global_props.host_linux_version == "4.14",
-    reason="MFD_HUGETLB | MFD_ALLOW_SEALING only supported on kernels >= 4.16",
-)
 def test_negative_huge_pages_plus_balloon(uvm_plain):
     """Tests that huge pages and memory ballooning cannot be used together"""
     uvm_plain.memory_monitor = None
@@ -283,10 +263,6 @@ def test_negative_huge_pages_plus_balloon(uvm_plain):
         uvm_plain.basic_config(huge_pages=HugePagesConfig.HUGETLBFS_2MB)
 
 
-@pytest.mark.skipif(
-    global_props.host_linux_version == "4.14",
-    reason="MFD_HUGETLB | MFD_ALLOW_SEALING only supported on kernels >= 4.16",
-)
 def test_negative_huge_pages_plus_initrd(uvm_with_initrd):
     """Tests that huge pages and initrd cannot be used together"""
     uvm_with_initrd.jailer.daemonize = False

tools/devtool

@@ -605,7 +605,7 @@ apply_performance_tweaks() {
     # https://www.kernel.org/doc/html/v4.12/admin-guide/pm/intel_pstate.html
     echo 100 |sudo tee /sys/devices/system/cpu/intel_pstate/min_perf_pct &> /dev/null
     echo 100 |sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct &> /dev/null
-  elif [[ -f /sys/devices/system/cpu/cpufreq/boost ]] && [ ! $(uname -r | grep 4.14) ]; then
+  elif [[ -f /sys/devices/system/cpu/cpufreq/boost ]]; then
     echo 0 |sudo tee /sys/devices/system/cpu/cpufreq/boost &> /dev/null
   fi