On Jun 29, 2014, at 8:57 PM, Qu Wenruo <[email protected]> wrote: >> > Finally find the stable method to reproduce the problem on 3.16-rc2, > the point is if we mount subvol,ro first, then you can't mount the hole > device: > > # mkfs.btrfs -f /dev/sda6 > # mount /dev/sda6 /mnt/btrfs/ > # btrfs sub create /mnt/btrfs/subv > Create subvolume '/mnt/btrfs/subv' > # umount /mnt/btrfs > # mount -o subvol=subv,ro /dev/sda6 /mnt/other/ > # LANG=C mount /dev/sda6 /mnt/btrfs/ > mount: /dev/sda6 is already mounted or /mnt/btrfs busy > /dev/sda6 is already mounted on /mnt/other
Similar problem: if you mount subvol,rw and then subvol,ro it succeeds, but then mount another subvol,rw it fails. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
