It's there for when you bring Linux up in an LPAR with bajillions of devices defined, like an old z/OS LPAR for example. The IPL takes forever as udev enumerates all those devices in /sys and /dev, and then you're running a system that can touch all the devices which it should not have access to.
If you're running under z/VM, you can disable the cio_ignore feature entirely by removing the cio_ignore statement from the kernel paramater in /etc/zipl.conf and rewriting the ipltest with the zipl command. If you're running under LPAR, you really ought to be removing non Linux devices from the IODF access list anyway, but it does allow you an additional layer of configurability if you decide you want it. -- Jay Brenneman ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
