On 02/12/2012 03:31 AM, Lukas Czerner wrote:
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
Ok, I got it, it was my fault I had forgotten that I had used the
scratch partition for an encryption test a while back. Sorry! I am
getting a "[not run] FSTRIM is not supported" though, I think I need a
device that supports discard. I will poke around Monday and see if I
can borrow one from somebody.
Allison Henderson
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