add kernel version detect for bbr

tasks/sysctl.yml

@@ -34,14 +34,14 @@
     name: net.core.default_qdisc
     value: fq
     sysctl_set: true
-  when: ansible_os_family == 'Debian' or ansible_distribution_major_version|int > 7
+  when: ansible_kernel.startswith("5.") or ansible_kernel.startswith("4.9.") or (ansible_kernel.startswith("4.1") and not ansible_kernel.startswith("4.1."))
 - name: TCP BBR
   become: true
   sysctl:
     name: net.ipv4.tcp_congestion_control
     value: bbr
     sysctl_set: true
-  when: ansible_os_family == 'Debian' or ansible_distribution_major_version|int > 7
+  when: ansible_kernel.startswith("5.") or ansible_kernel.startswith("4.9.") or (ansible_kernel.startswith("4.1") and not ansible_kernel.startswith("4.1."))
 - name: limit
   become: true
   pam_limits: