Hello listmates, I am seeing some weird messages in /var/log/messages, related to my CPUs. Sometimes these messages are hours apart, sometimes they appear every two - three minutes. Their appearance seems to be random. I did some Googling and there appears to be talk about a kernel bug, but nothing really concrete. Could someone help shed some light on these messages, please? What do they mean, are they causing trouble and is there something I can do to fix them? Dec 6 22:18:31 zaphod kernel: CPU0 attaching NULL sched-domain. Dec 6 22:18:31 zaphod kernel: CPU1 attaching NULL sched-domain. Dec 6 22:18:31 zaphod kernel: CPU2 attaching NULL sched-domain. Dec 6 22:18:31 zaphod kernel: CPU3 attaching NULL sched-domain. Dec 6 22:18:31 zaphod kernel: CPU0 attaching sched-domain: Dec 6 22:18:31 zaphod kernel: domain 0: span 00000000,00000000,00000000,00000003 Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,00000001 00000000,00000000,00000000,00000002 Dec 6 22:18:31 zaphod kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,00000003 00000000,00000000,00000000,0000000c Dec 6 22:18:31 zaphod kernel: CPU1 attaching sched-domain: Dec 6 22:18:31 zaphod kernel: domain 0: span 00000000,00000000,00000000,00000003 Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,00000002 00000000,00000000,00000000,00000001 Dec 6 22:18:31 zaphod kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,00000003 00000000,00000000,00000000,0000000c Dec 6 22:18:31 zaphod kernel: CPU2 attaching sched-domain: Dec 6 22:18:31 zaphod kernel: domain 0: span 00000000,00000000,00000000,0000000c Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,00000004 00000000,00000000,00000000,00000008 Dec 6 22:18:31 zaphod kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,0000000c 00000000,00000000,00000000,00000003 Dec 6 22:18:31 zaphod kernel: CPU3 attaching sched-domain: Dec 6 22:18:31 zaphod kernel: domain 0: span 00000000,00000000,00000000,0000000c Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,00000008 00000000,00000000,00000000,00000004 Dec 6 22:18:31 zaphod kernel: domain 1: span 00000000,00000000,00000000,0000000f Dec 6 22:18:31 zaphod kernel: groups: 00000000,00000000,00000000,0000000c 00000000,00000000,00000000,00000003 Thanks in advance, Joop