Comment # 6 on bug 925564 from zhen ren

"
But when trying to mount with this label, mount hangs up for a while(feel about
one minute), then brain-split happened to cluster, next, n1(local) reboot,
after a while, cluster go normal status, finally, mount return.
"

This don't appear again after reboot all nodes on the cluster.

So, adding "udevadm trigger" can solve mount by "LABEL=" on remote nodes.

Should we close this bug? 
Or try to find out solution that trigger udev in low level to create
corresponding syslink in /dev/disk/by-label.