readlink cause the cpu 100% usage

asked 2012-11-29 07:36:32 -0600

jing gravatar image

i have a single node with openstack installed. about few days ago, when i boot a vm with "nova boot", the vm hangs in Spawning state, well, i restart the nova,but it does not work. OK,then i want to reboot the host,but i can not restart the host, finally , i found the readlink process cause the cpu 100% usage. ################################################################# root@openstack:/dev# top ...... 24796 root 20 0 7172 356 280 R 99 0.0 23:37.68 readlink
27665 root 20 0 7172 356 280 R 98 0.0 18:07.41 readlink ......

root@superstack:~# ps -ef | grep readlink root 4298 16710 0 15:36 pts/15 00:00:00 grep --color=auto readlink root 24796 1 99 15:09 ? 00:26:34 /bin/readlink -nm /tmp/openstack-disk-mount-tmp8txMP6/root/.ssh root 27665 1 99 15:14 ? 00:21:04 /bin/readlink -nm /tmp/openstack-disk-mount-tmpEVwj5h/root/.ssh #################################################################

when i hard reboot the host,everything goes well,but today the same damn thing appear in the single node.

any help will appriciate!!! Thanks in advance!!!

edit retag flag offensive close merge delete

3 answers

Sort by ยป oldest newest most voted
0

answered 2012-12-02 12:36:05 -0600

jing gravatar image

sometimes libvirt-lxc will cause 100% cpu usage,i guess this problem will related with nbd....i will do futher test

edit flag offensive delete link more
0

answered 2012-11-29 13:56:56 -0600

dims-v gravatar image

Are you using VFS?

edit flag offensive delete link more
0

answered 2012-11-30 00:46:28 -0600

jing gravatar image

i use nova-compute-lxc and the libvirt-type is lxc , i have hard reboot the host, and i will try reappear the problem. how to confirm if i use the VFS? when the lxc instance start it will use nbd(network block devices) Thanks!

edit flag offensive delete link more

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower

Stats

Asked: 2012-11-29 07:36:32 -0600

Seen: 94 times

Last updated: Dec 02 '12