On Mon, Aug 16, 2010 at 11:55 PM, Alasdair G Kergon <agk@xxxxxxxxxx> wrote: > On Mon, Aug 16, 2010 at 11:32:15PM +0800, Jeff Chua wrote: >> It'll be nice if lvm returns a more meanful message like "ioctl >> failed. Check /proc/misc to ensure the device is mapped correctly." > > No need - LVM should be quite capable of detecting/dealing with the problem. Ok, cool. >> To take care of it automatically with udev, I'm doing this in rc.S >> if [ -f /sys/devices/virtual/misc/device-mapper/dev ] >> then >> NODE=$(</sys/devices/virtual/misc/device-mapper/dev) >> rm -f /dev/mapper/control >> mknod /dev/mapper/control c ${NODE/:/ } > > The whole point of this change was to trigger the loading of dm-mod > automatically for people using it as a module, based on using a known > major/minor number instead of a dynamic one only known after the module > has been loaded. That needs to happen regardless of whether someone is > using udev or not. > > This can all be fixed easily enough in userspace. I'm not using module. It's all built-in to the kernel. Hopefully this would be taken care of as well. That's why I had it in rc.S just before the lvm filesystems are mounted. Thanks, Jeff. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel