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<TITLE>Re: [Ocfs2-users] Issue with OCFS2 mount</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Sunil;<BR>
<BR>
Just wanted to say thanks. We disabled the emtaecc feature on one of the volumes (a backup volume) to test and the issue went away.<BR>
<BR>
What we had:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'># tunefs.ocfs2 -q -Q "All Features: %M %H %O\n" /dev/mapper/backup-part1<BR>
All Features: backup-super strict-journal-super sparse extended-slotmap inline-data metaecc xattr indexed-dirs refcount unwritten usrquota grpquota<BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
<BR>
What we did:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT SIZE="2"><FONT FACE="Consolas, Courier New, Courier"><SPAN STYLE='font-size:10pt'># tunefs.ocfs2 --fs-features=nometaecc /dev/mapper/data2-part1<BR>
<BR>
# tunefs.ocfs2 -q -Q "All Features: %M %H %O\n" /dev/mapper/data2-part1<BR>
All Features: backup-super strict-journal-super sparse inline-data xattr<BR>
indexed-dirs unwritten<BR>
</SPAN></FONT></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
After several days, the logs and mount look good.<BR>
<BR>
Thanks again,<BR>
-Rory<BR>
<BR>
<BR>
On 2012-08-29 2:13 PM, "Sunil Mushran" <<a href="sunil.mushran@gmail.com">sunil.mushran@gmail.com</a>> wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Forgot to add that this issue is limited to metaecc. So you could avoid the issue in your<BR>
same setup by not enabling metaecc on the volume. And last I checked mkfs did not<BR>
enable it by default.<BR>
<BR>
On Mon, Aug 27, 2012 at 10:35 AM, Sunil Mushran <<a href="sunil.mushran@gmail.com">sunil.mushran@gmail.com</a>> wrote:<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>So you are running into a bug that has been fixed in 2.6.36. Upgrade to that version,<BR>
if not something more current.<BR>
<BR>
$ git describe --tags 13ceef09<BR>
v2.6.35-rc3-14-g13ceef0<BR>
<BR>
commit 13ceef099edd2b70c5a6f3a9ef5d6d97cda2e096<BR>
Author: Jan Kara <<a href="jack@suse.cz">jack@suse.cz</a>><BR>
Date: Wed Jul 14 07:56:33 2010 +0200<BR>
<BR>
jbd2/ocfs2: Fix block checksumming when a buffer is used in several transactions<BR>
<BR>
OCFS2 uses t_commit trigger to compute and store checksum of the just<BR>
committed blocks. When a buffer has b_frozen_data, checksum is computed<BR>
for it instead of b_data but this can result in an old checksum being<BR>
written to the filesystem in the following scenario:<BR>
<BR>
1) transaction1 is opened<BR>
2) handle1 is opened<BR>
3) journal_access(handle1, bh)<BR>
- This sets jh->b_transaction to transaction1<BR>
4) modify(bh)<BR>
5) journal_dirty(handle1, bh)<BR>
6) handle1 is closed<BR>
7) start committing transaction1, opening transaction2<BR>
8) handle2 is opened<BR>
9) journal_access(handle2, bh)<BR>
- This copies off b_frozen_data to make it safe for transaction1 to commit.<BR>
jh->b_next_transaction is set to transaction2.<BR>
10) jbd2_journal_write_metadata() checksums b_frozen_data<BR>
11) the journal correctly writes b_frozen_data to the disk journal<BR>
12) handle2 is closed<BR>
- There was no dirty call for the bh on handle2, so it is never queued for<BR>
any more journal operation<BR>
13) Checkpointing finally happens, and it just spools the bh via normal buffer<BR>
writeback. This will write b_data, which was never triggered on and thus<BR>
contains a wrong (old) checksum.<BR>
<BR>
This patch fixes the problem by calling the trigger at the moment data is<BR>
frozen for journal commit - i.e., either when b_frozen_data is created by<BR>
do_get_write_access or just before we write a buffer to the log if<BR>
b_frozen_data does not exist. We also rename the trigger to t_frozen as<BR>
that better describes when it is called.<BR>
<BR>
Signed-off-by: Jan Kara <<a href="jack@suse.cz">jack@suse.cz</a>><BR>
Signed-off-by: Mark Fasheh <<a href="mfasheh@suse.com">mfasheh@suse.com</a>><BR>
Signed-off-by: Joel Becker <<a href="joel.becker@oracle.com">joel.becker@oracle.com</a>><BR>
<BR>
<BR>
On Mon, Aug 27, 2012 at 5:10 AM, Rory Kilkenny <<a href="Rory.Kilkenny@ticoon.com">Rory.Kilkenny@ticoon.com</a>> wrote:<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'># uname -a<BR>
Linux FILEt1 2.6.34.7-0.7-desktop #1 SMP PREEMPT 2010-12-13 11:13:53 +0100 x86_64 x86_64 x86_64 GNU/Linux<BR>
<BR>
# modinfo ocfs2<BR>
filename: /lib/modules/2.6.34.7-0.7-desktop/kernel/fs/ocfs2/ocfs2.ko<BR>
license: GPL<BR>
author: Oracle<BR>
version: 1.5.0<BR>
description: OCFS2 1.5.0<BR>
srcversion: B13569B35F99D43FA80D129<BR>
depends: jbd2,ocfs2_stackglue,quota_tree,ocfs2_nodemanager<BR>
vermagic: 2.6.34.7-0.7-desktop SMP preempt mod_unload modversions <BR>
<BR>
# mkfs.ocfs2 --version<BR>
mkfs.ocfs2 1.4.3<BR>
<BR>
<BR>
<BR>
<BR>
On 12-08-24 5:44 PM, "Sunil Mushran" <<a href="sunil.mushran@gmail.com">sunil.mushran@gmail.com</a> <<a href="http://sunil.mushran@gmail.com">http://sunil.mushran@gmail.com</a>> > wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>What is the version of the kernel, ocfs2 and ocfs2 tools?<BR>
<BR>
uname -a<BR>
modinfo ocfs2<BR>
mkfs.ocfs2 --version<BR>
<BR>
On Fri, Aug 24, 2012 at 1:09 PM, Rory Kilkenny <<a href="Rory.Kilkenny@ticoon.com">Rory.Kilkenny@ticoon.com</a> <<a href="http://Rory.Kilkenny@ticoon.com">http://Rory.Kilkenny@ticoon.com</a>> > wrote:<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>We have an HP P2000 G3 Storage array, fiber connected. The storage array has a RAID5 array broken into 2 physical OCFS2 volumes (A & B). <BR>
<BR>
A & B are both mounted and formatted as NTFS.<BR>
<BR>
One of the volumes is NFS mounted. <BR>
<BR>
Every couple of months or so we start getting tons of errors on the NFS mounted volume:<BR>
<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Aug 24 09:48:13 FILEt2 kernel: [2234285.848940] (ocfs2_wq,13844,7):ocfs2_block_check_validate:443 ERROR: CRC32 failed: stored: 0, computed 1467126086. Applying ECC.<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849252] (ocfs2_wq,13844,7):ocfs2_block_check_validate:457 ERROR: Fixed CRC32 failed: stored: 0, computed 3828104806<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849256] (ocfs2_wq,13844,7):ocfs2_validate_extent_block:903 ERROR: Checksum failed for extent block 1169089<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849261] (ocfs2_wq,13844,7):__ocfs2_find_path:1861 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849264] (ocfs2_wq,13844,7):ocfs2_find_leaf:1958 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849267] (ocfs2_wq,13844,7):ocfs2_find_new_last_ext_blk:6655 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849270] (ocfs2_wq,13844,7):ocfs2_do_truncate:6900 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849274] (ocfs2_wq,13844,7):ocfs2_commit_truncate:7556 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849280] (ocfs2_wq,13844,7):ocfs2_truncate_for_delete:593 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849284] (ocfs2_wq,13844,7):ocfs2_wipe_inode:769 ERROR: status = -5<BR>
Aug 24 09:48:13 FILEt2 kernel: [2234285.849287] (ocfs2_wq,13844,7):ocfs2_delete_inode:1067 ERROR: status = -5<BR>
<BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
If we pull all the data off, destroy the volume, rebuilt it, and copy our data back, all works fine; for a while.<BR>
<BR>
This issue does not happen on the non NFS mounted volume. I am currently assuming the issue is with NFS and how we have it configured (which to the best of my knowledge is default). <BR>
<BR>
Has anyone had a similar experience and be able to share some insight and knowledge on any tricks with NFS and OCFS2 volumes?<BR>
<BR>
Thanks in advance.<BR>
<BR>
<BR>
<BR>
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