Red Hat Bugzilla – Bug 139374
ext3 data=journal with external journal deadlock
Last modified: 2007-11-30 17:07:05 EST
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Description of problem:
There was a deadlock bug in full data journaling for ext3 in 2.4.21
that got fixed aroud 2.4.23 iirc. This bug still exists in RHEL kernel
and is making it unusuable for busy mailservers, for example.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Configure ext3 with data=journal and large external journal
2.Run bonnie++ on it with data size about 10 times the amount of ram
Actual Results: System reproducibly freezes, usualy in the "writing
Expected Results: Bonnie++ run should finish as expected.
I tested this on single cpu machine with 384mb ram, uniprocessor
kernel, system on ide drive, ext3 partition in question on one scsi
drive and its external journal on another scsi drive. The external
journal I created is 400mb.
This bug is filed against RHEL 3, which is in maintenance phase.
During the maintenance phase, only security errata and select mission
critical bug fixes will be released for enterprise products. Since
this bug does not meet that criteria, it is now being closed.
For more information of the RHEL errata support policy, please visit:
If you feel this bug is indeed mission critical, please contact your
support representative. You may be asked to provide detailed
information on how this bug is affecting you.