i have issue in /var/log/messages
Sep 30 05:40:20 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:40:21 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:40:21 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:40:22 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:40:22 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:40:24 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:40:25 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:45:05 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:45:07 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:45:08 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:45:10 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:45:10 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:45:10 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:45:11 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:45:12 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:45:21 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:45:21 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:45:23 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:45:24 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:50:07 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:50:11 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:50:13 nod5 kernel: Can't load ipv6 module due to service vz is started
Sep 30 05:50:17 nod5 modprobe: FATAL: Error inserting ipv6 (/lib/modules/2.6.18-308.8.2.el5.028stab101.1/kernel/net/ipv6/ipv6.ko): Device or resource busy
Sep 30 05:50:20 nod5 kernel: Can't load ipv6 module due to service vz is started
note : i don't user ipv6 on server
# uname --all
Linux 2.6.18-308.8.2.el5.028stab101.1 #1 SMP Sun Jun 24 20:25:35 MSD 2012 x86_64 x86_64 x86_64 GNU/Linux
# cat ./redhat-release
CentOS release 5.8 (Final