Steven J. Long posted on Fri, 02 Aug 2013 12:31:08 +0100 as excerpted: > As Rich said, lvm doesn't link outside rootfs so it's not an issue: you > only really need an initramfs if rootfs is on lvm/encrypted/raid, or you > need udev to get through localmount.
Or, unfortunately, for root on mult-device btrfs[1], since the usual kernel commandline rootflags=device=/dev/whatever doesn't seem to work for some reason.[2] Tho hopefully that bug will be fixed before the "experimental" label is stripped from btrfs... --- [1] Yes, as appropriate for running on an experimental fs, I have backups, tho the dual-device raid1 mode I'm using is /reasonably/ stable, now. I switched to btrfs when I upgraded to ssd, both for the ssd support and for checksummed data/metadata with a second copy to retrieve from if the first fails the checksum. [2] I tried with a btrfs raid1 and could mount either device with root= and rootflags=degraded, so it was definitely parsing rootflags, but no way was it taking rootflags=device= to mount them undegraded without a userspace btrfs device scan first, and that requires an initr*. Maybe it was a problem with the kernel splitting at the second = instead of the first, I don't know, but it definitely wasn't working. So now I'm running dracut with several of its default modules stripped via INSTALL_MASK including the one pulling in kmod since I'm running monolithic kernel and have kmod package.provided, and USE=btrfs plus adding it to the module config. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman
