On Sun, 12 Feb 2012, Allison Henderson wrote: > On 02/10/2012 12:10 PM, Lukas Czerner wrote: > > Hi Allison, > > > > I found quite disturbing problem when testing loop discard support on > > file systems where PAGE_SIZE> blocksize. The result is that the file > > system image is completely destroyed, but the underlying file system > > seems ok. I have seen this messages in the logs: > > > > EXT4-fs error (device sdb): ext4_ext_search_left:1221: inode #12: comm > > flush-8:16: ix (2248761) != EXT_FIRST_INDEX (0) (depth 1)! > > EXT4-fs (sdb): delayed block allocation failed for inode 12 at logical > > offset 2258177 with max blocks 64 with error -5 > > EXT4-fs (sdb): This should not happen!! Data will be lost > > > > and > > > > EXT4-fs error (device sdd2): ext4_ext_get_blocks: inode #12: (comm > > loop0) bad extent address iblock: 34479, depth: 3 pblock 0 > > > > Steps to reproduce > > > > mkfs.ext4 -b1024 /dev/sdb > > mount /dev/sdb /mnt/test2 > > dd if=/dev/zero of=/mnt/test2/file bs=1M count=4096 > > losetup /dev/loop0 /mnt/test2/file > > > > cd xfstests > > > > export TEST_DIR=/mnt/test > > export TEST_DEV=/dev/sda > > export SCRATCH_DEV=/dev/loop0 > > export SCRATCH_MNT=/mnt/test1 > > export MKFS_OPTIONS="-F -b1024" > > export MOUNT_OPTIONS="-o discard" > > export FSTYP="ext4" > > > > while ./check 251; do echo "OK"; done > > > > ..and just wait and watch the logs. > > > > Do you have any idea what might be the problem ? > > > > Thanks! > > -Lukas > > > > Hi Lukas, > > Im having some trouble getting the bug to reproduce for me. I have the > dm-crypt module, but when I get to the test loop, i get "mount: unknown > filesystem type 'crypto_LUKS'". Is there something else I need to do or > install? With out being able to dig into it, I cant think of why it would do > that, I have not seen it produce that error before. :( Thx! > > Allison Henderson Hi Allison, I do not understand it either, there is no dm-crypt involved in this scenario. One think that comes to my mind is that TEST_DEV (in my case /dev/sda) needs to contain valid file system, but that is just how xfstests works. Please, let me know if you still have problems reproducing it. Thanks! -Lukas -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
