On Wed, Oct 09, 2013 at 11:53:23PM +0800, Eryu Guan wrote: > Hi all, > > I hit a BUG_ON while playing with btrfs balance. Kernel is > 3.12-rc4. > > The reproducer is a script doing subvolume create/mount/umount/delete > in loop at back ground and do balance at the same time. > > It's reproducable everytime. And seems like this is a regression, I > cannot reproduce it on 3.10 kernel. (I'll write a test case for > xfstests.) > > Reproducer: > > # cat test.sh > #!/bin/bash > > btrfs_dev=$1 > btrfs_mnt=$2 > pid=$$ > subvol_mnt=/mnt/subvol_$pid > > mkdir -p $subvol_mnt > > trap "umount $subvol_mnt; btrfs sub del $btrfs_mnt/sub_$pid; rmdir > $subvol_mnt; exit 0" 0 1 2 3 15 > > while true;do > btrfs subvolume create $btrfs_mnt/sub_$pid > mount -o subvol=sub_$pid $btrfs_dev $subvol_mnt > umount $subvol_mnt > btrfs subvolume delete $btrfs_mnt/sub_$pid > done > > and do > > # mkfs -t btrfs -f /dev/loop0 /dev/loop1 > # mount /dev/loop0 /mnt/btrfs > # ./test.sh /dev/loop0 /mnt/btrfs >/dev/null & > # btrfs fi balance /mnt/btrfs >
Fixed by Miao's patches in btrfs-next. Thanks, Josef -- 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
