[Ocfs2-devel] Fail to mount an OCFS volume for thesecondtimeunder kernel 2.6.

[Zhang, Sonic]

Hi,

	After changing the journal creation code under kernel 2.4 and 2.6. I =
think the second mount bug of OCFS2 is caused in function =
ocfs_journal_create(), which call Linux Journaling function =
journal_create(). I guess this bug is actually in JBD code of the kernel =
2.6.

Steps:
1. Leave the ocfs_journal_create() code and remove the =
ocfs_journal_update_config() code in routine ocfs_check_volume() when =
mount a ocfs volume for the first time under kernel 2.4.=20
2. Remove the ocfs_journal_create() code and leave the =
ocfs_journal_update_config() code in routine ocfs_check_volume() when =
redo the first mount under kernel 2.6. These 2 operations work together =
to complete the first mount successfully.=20
3. Mount the ocfs volume for the second time under kernel 2.6. It =
completes successfully. That means the bug is in routine =
ocfs_journal_create().


	Do you have any idea?
	Thanks


*********************************************
Sonic Zhang
Software Engineer
Intel China Software Lab
Tel: (086)021-52574545-1667
iNet: 752-1667
*********************************************=20

-----Original Message-----
From: ocfs2-devel-bounces at oss.oracle.com =
[mailto:ocfs2-devel-bounces at oss.oracle.com] On Behalf Of Zhang, Sonic
Sent: 2004=C4=EA4=D4=C212=C8=D5 15:50
To: Ocfs2-Devel
Subject: RE: [Ocfs2-devel] Fail to mount an OCFS volume for =
thesecondtimeunder kernel 2.6.

Hi,

	I checked some original svn versions of the OCFS2 source code, rev.810, =
815, 818, 819, 820, 821 and 823. All versions have the same bug under =
kernel 2.6 as the latest version.


*********************************************
Sonic Zhang
Software Engineer
Intel China Software Lab
Tel: (086)021-52574545-1667
iNet: 752-1667
*********************************************=20

-----Original Message-----
From: ocfs2-devel-bounces at oss.oracle.com =
[mailto:ocfs2-devel-bounces at oss.oracle.com] On Behalf Of Zhang, Sonic
Sent: 2004=C4=EA4=D4=C29=C8=D5 17:36
To: Ocfs2-Devel
Subject: RE: [Ocfs2-devel] Fail to mount an OCFS volume for the =
secondtimeunder kernel 2.6.

Hi,

	I tried to mount the OCFS volume under kernel 2.4 first. Then, turn to =
kernel 2.6 and mount for the second time. The OCFS driver under kernel =
2.6 works well in this cases. It seems the bug is in the journal =
creation code which is used during the first mount operation. But, I =
fail to locate which code caused the different behavior between kernel =
2.6 and 2.4 by now.=20

	Do you have any opinions?

	Thank you.


*********************************************
Sonic Zhang
Software Engineer
Intel China Software Lab
Tel: (086)021-52574545-1667
iNet: 752-1667
*********************************************=20

-----Original Message-----
From: ocfs2-devel-bounces at oss.oracle.com =
[mailto:ocfs2-devel-bounces at oss.oracle.com] On Behalf Of Zhang, Sonic
Sent: 2004=C4=EA4=D4=C28=C8=D5 13:40
To: Ocfs2-Devel
Subject: RE: [Ocfs2-devel] Fail to mount an OCFS volume for the second =
timeunder kernel 2.6.

Hi,

	I checked this bug on kernel 2.4. It doesn't occur.
	So, this bug is related to kernel 2.6 porting.


*********************************************
Sonic Zhang
Software Engineer
Intel China Software Lab
Tel: (086)021-52574545-1667
iNet: 752-1667
*********************************************=20

-----Original Message-----
From: ocfs2-devel-bounces at oss.oracle.com =
[mailto:ocfs2-devel-bounces at oss.oracle.com] On Behalf Of Zhang, Sonic
Sent: 2004=C4=EA4=D4=C27=C8=D5 17:25
To: Ocfs2-Devel
Subject: [Ocfs2-devel] Fail to mount an OCFS volume for the second time =
under kernel 2.6.

Hi,

	After check out the latest svn source, I found I fail to mount
an OCFS volume for the second time under kernel 2.6. The system will
halt if I do so. But, I remember I did it successfully in the former
version. I submitted it into the bugzilla.

See following details.

Steps:
1. create ocfs volume.
2. mount this volume.
3. umount this volume.
4. mount this volume again.

Results:
System halt with error information.
JBD: no valid journal superblock found
(1342) ERROR: status=3D-22, fs/ocfs2/osb.c, 407
(1342) ERROR: status=3D-22, fs/ocfs2/super.c, 1032


*********************************************
Sonic Zhang
Software Engineer
Intel China Software Lab
Tel: (086)021-52574545-1667
iNet: 752-1667
*********************************************=20

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