Messages in this thread | | | Date | Sat, 21 Feb 2004 14:24:24 -0600 | From | "Dwayne C. Litzenberger" <> | Subject | 2.6.2 ext3 loopback bug with data=journal |
| |
I've been getting an error message upon running e2fsck on a freshly-created ext3 loopback filesystem:
Superblock has a bad ext3 journal (inode 8). Clear? yes
*** ext3 journal has been deleted - filesystem is now ext2 only ***
How to reproduce the bug:
# /tmp is on an ext3 filesystem mounted with data=journal # Create a 1 GiB (approx) empty file # (note that the bug still appears when using a non-sparse file) dd if=/dev/zero of=/tmp/dummyfs bs=1k count=1 seek=1M # Make the filesystem mke2fs -j -F /tmp/dummyfs # Check the filesystem. This will find errors and delete the # journal e2fsck -y /tmp/dummyfs
Things that cause the bug to *not* be reproduced:
- mount /tmp with data=ordered instead of data=journal - create a 2GB ext2 loopback filesystem somewhere, and mount it over /tmp before executing the code above (i.e. put another filesystem layer in between mke2fs and the buggy ext3 filesystem)
I've included more verbose output below.
Also, I don't read linux-kernel much these days, so please Cc: me if you want me to reply.
-- Dwayne C. Litzenberger <dlitz@dlitz.net>
---- BEGIN OUTPUT ---- gando:~# dd if=/dev/zero of=/tmp/dummyfs bs=1k count=1 seek=1M 1+0 records in 1+0 records out 1024 bytes transferred in 0.000747 seconds (1370992 bytes/sec) gando:~# mke2fs -j -F /tmp/dummyfs mke2fs 1.35-WIP (21-Aug-2003) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 131072 inodes, 262144 blocks 13107 blocks (5.00%) reserved for the super user First data block=0 8 block groups 32768 blocks per group, 32768 fragments per group 16384 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376
Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 37 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. gando:~# e2fsck -y /tmp/dummyfs e2fsck 1.35-WIP (21-Aug-2003) Superblock has a bad ext3 journal (inode 8). Clear? yes
*** ext3 journal has been deleted - filesystem is now ext2 only ***
Superblock doesn't have has_journal flag, but has ext3 journal inode. Clear? yes
/tmp/dummyfs was not cleanly unmounted, check forced. Pass 1: Checking inodes, blocks, and sizes Journal inode is not in use, but contains data. Clear? yes
Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information Block bitmap differences: -(521--8722) Fix? yes
Free blocks count wrong for group #0 (24045, counted=32247). Fix? yes
Free blocks count wrong (249815, counted=258017). Fix? yes
/tmp/dummyfs: ***** FILE SYSTEM WAS MODIFIED ***** /tmp/dummyfs: 11/131072 files (0.0% non-contiguous), 4127/262144 blocks gando:~# ---- END OUTPUT ---- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |