2014-12-02 0:24 GMT+01:00 Robert White <rwh...@pobox.com>: > On 12/01/2014 02:10 PM, MegaBrutal wrote: >> >> Since having duplicate UUIDs on devices is not a problem for me since >> I can tell them apart by LVM names, the discussion is of little >> relevance to my use case. Of course it's interesting and I like to >> read it along, it is not about the actual problem at hand. >> > > Which is why you use the device= mount option, which would take LVM names > and which was repeatedly discussed as solving this very problem. > > Once you decide to duplicate the UUIDs with LVM snapshots you take up the > burden of disambiguating your storage. > > Which is part of why re-reading was suggested as this was covered in some > depth and _is_ _exactly_ about the problem at hand.
Nope. root@reproduce-1391429:~# cat /proc/cmdline BOOT_IMAGE=/vmlinuz-3.18.0-031800rc5-generic root=/dev/mapper/vg-rootlv ro rootflags=device=/dev/mapper/vg-rootlv,subvol=@ Observe, device= mount option is added. root@reproduce-1391429:~# ./reproduce-1391429.sh #!/bin/sh -v lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert rootlv vg -wi-ao--- 1.00g swap0 vg -wi-ao--- 256.00m grub-probe --target=device / /dev/mapper/vg-rootlv grep " / " /proc/mounts rootfs / rootfs rw 0 0 /dev/dm-1 / btrfs rw,relatime,space_cache 0 0 lvcreate --snapshot --size=128M --name z vg/rootlv Logical volume "z" created lvs LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert rootlv vg owi-aos-- 1.00g swap0 vg -wi-ao--- 256.00m z vg swi-a-s-- 128.00m rootlv 0.11 ls -l /dev/vg/ total 0 lrwxrwxrwx 1 root root 7 Dec 2 00:12 rootlv -> ../dm-1 lrwxrwxrwx 1 root root 7 Dec 2 00:12 swap0 -> ../dm-0 lrwxrwxrwx 1 root root 7 Dec 2 00:12 z -> ../dm-2 grub-probe --target=device / /dev/mapper/vg-z grep " / " /proc/mounts rootfs / rootfs rw 0 0 /dev/dm-2 / btrfs rw,relatime,space_cache 0 0 lvremove --force vg/z Logical volume "z" successfully removed grub-probe --target=device / /dev/mapper/vg-rootlv grep " / " /proc/mounts rootfs / rootfs rw 0 0 /dev/dm-1 / btrfs rw,relatime,space_cache 0 0 Problem still reproduces. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
