Using btrfs as the root filesystem on my Ubuntu 9.10 powered laptop I discoverd that mount is not showing the actual passed rootflags= but shows what is put in the /etc/fstab. First of all, I'm not sure if that is an intended behavior and if not, if it's a problem of mount or btrfs. Example: Following Goffredo's example there's a subvolume called rootfs which is - surprisingly ;) - the root of the linux. The corresponding line in fstab is $ cat /etc/fstab [...] # / was on /dev/sda3 during installation UUID=<some-scary-UUID> / btrfs subvol=rootfs 0 1 $ mount [...] /dev/sda3 on / type btrfs (rw,subvol=rootfs) I create a snapshot of the rootfs called rootfs-snap-001 and create it in the / of the btrfs volume itself. Not modifying grub2, I just edit grub on the go. While booting I edit the /linux-kernel... entry and replace rootflags=subvol=rootfs with rootflags=subvol=rootfs-snap-001. That boots up just fine but the mount output still is $ mount [...] /dev/sda3 on / type btrfs (rw,subvol=rootfs) ... and /etc/mtab is indeed $ cat /etc/mtab [...] /dev/sda3 / btrfs rw,subvol=rootfs 0 0 shouldn't mount and /etc/mtab reflect the parameters in use? Cheers, Thomas-- 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
