The problem is caused by the following file.
/sys/devices/pci0000:00/0000:00:03.0/0000:01:00.0/vpd (MegaRAID SAS 9240 DEVPATH=/devices/pci0000:00/0000:00:03.0/0000:01:00.0) -rw------- 1 root root 32768 2011-12-02 14:51 vpd
executing the command will cause halting: sudo cat vpd The vpd file can be only read/write by root, so it explains why running udev_resource with normal user can't reproduce this problem.
The problem is caused by the following file.
/sys/devices/ pci0000: 00/0000: 00:03.0/ 0000:01: 00.0/vpd /devices/ pci0000: 00/0000: 00:03.0/ 0000:01: 00.0)
(MegaRAID SAS 9240 DEVPATH=
-rw------- 1 root root 32768 2011-12-02 14:51 vpd
executing the command will cause halting: sudo cat vpd
The vpd file can be only read/write by root, so it explains why running udev_resource with normal user can't reproduce this problem.