lvm2create_initrd is setting up an initrd file, which initializes LVM partitions This has become mandatory starting from udev-182 if your / or /usr parition is located a LVM partition. In exactly that case, if you try to create an initrd file with lvm2create_initrd, your boot process will hang during initrd initialization of LVM2 partitions. Problem is that /sbin/init on the initrd has not been properly created by lvm2create_initrd. /sbin/init uses shell variable $LVM which has not been initialized. /sbin/init, line 84: # run a shell if we're passed lvm2rescue on commandline grep lvm2rescue /proc/cmdline 1>/dev/null 2>&1 if [ $? -eq 0 ]; then $LVM vgchange --ignorelockingfailure -P -a y do_shell else $LVM vgchange --ignorelockingfailure -a y fi $LVM is not initialised anywhere, so the command executed is "vgchange --ignorelockingfailure ...". If you are using lvm.static, vgchange cannot be found and the commands fail. Using a statically linked lvm command (lvm.static), $LVM should be set to: LVM="/sbin/lvm.static" The commands executed will then be "/sbin/lvm.static vgchange ...", which will work fine. Reproducible: Always Steps to Reproduce: 1. Setup LVM2 with your /usr filesystem on a separate LVM partition (use flags +static +static-libs +udev). 2. Upgrade to udev-182 and notice the portage warning after installation ("... Your system has /usr on a separate partition. This means you will need to use an initramfs to pre-mount /usr before udev runs ..."). 3. Create and install initrd file by using lvm2create_initrd (s. section lvm2create_initrd on http://www.gentoo-wiki.info/HOWTO_Install_Gentoo_on_an_LVM2_root_partition) 4. Reboot your machine. Actual Results: The boot process will stop within the initrd boot process and drop to a busybox prompt, telling you that it cannot find the command "vgchange". Expected Results: Booting succeeds. /sbin/init on the initrd file detects and premounts all LVM2 partitions before udev starts.
Created attachment 322521 [details] Screenshot of issue I seem to have hit the same issue while attempting to set up root on LVM. Screenshot attached.
agk: this one is suited for upstream
lvm2create_initrd is no longer shipped.
