When mounting a subvolume by name, mountinfo shows the name of the subvolume. When mounting a subvolume using subvolid it does not. Seems like a problem when trying to determine what is mounted. -o subvol=<name> # cat /proc/self/mountinfo | grep vda 43 34 0:29 /home /home rw,relatime shared:29 - btrfs /dev/vda1 rw,seclabel,space_cache 44 34 0:29 /boot /boot rw,relatime shared:30 - btrfs /dev/vda1 rw,seclabel,space_cache -o subvolid=<number> #cat /proc/self/mountinfo 43 34 0:29 / /home rw,relatime shared:29 - btrfs /dev/vda1 rw,seclabel,space_cache 44 34 0:29 / /boot rw,relatime shared:30 - btrfs /dev/vda1 rw,seclabel,space_cache By changing default subvolume to the ID of home subvolume, then mounting with no options: 43 34 0:29 / /home rw,relatime shared:29 - btrfs /dev/vda1 rw,seclabel,space_cache It seems the subvolid, and changed default subvolume behaviors are problematic, trying to determine what is mounted. I'd expect in all cases this should return a full path name, or a subvolume ID. kernel 3.11.4-301.fc20.x86_64 btrfs-progs-0.20.rc1.20130917git194aa4a-1.fc20.x86_64 Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
