From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 15391] New: EXT4_USE_FOR_EXT23 causes ext4 partition to be
 mounted as ext2
Date: Thu, 25 Feb 2010 03:05:29 GMT
Message-ID: <bug-15391-13602@http.bugzilla.kernel.org/>
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http://bugzilla.kernel.org/show_bug.cgi?id=15391

           Summary: EXT4_USE_FOR_EXT23 causes ext4 partition to be mounted
                    as ext2
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.33
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: alecm@gmx.com
        Regression: No


After setting "Use ext4 for ext2/ext3 file systems" and rebooting, my root
filesystem gets mounted as ext2. When the option is disabled, everything works
as expected.

Here are some relevant output:

$ grep ext[24] /etc/fstab
/dev/sda1       /boot  ext2    noauto,noatime      1 2
/dev/sda5       /      ext4    noatime             0 1

$ mount | grep ext[24]
/dev/root on / type ext2 (rw,noatime,barrier=1,data=ordered)
/dev/sda1 on /boot type ext2 (rw,noatime)

$ dmesg | grep -i ext[24]
EXT4-fs (sda5): mounted filesystem with ordered data mode
VFS: Mounted root (ext2 filesystem) readonly on device 259:131072.
EXT4-fs (sda1): mounted filesystem without journal

$ uname -a
Linux tux 2.6.33 #1 SMP PREEMPT Wed Feb 24 16:00:09 EST 2010 x86_64 Intel(R)
Core(TM)2 CPU T5300 @ 1.73GHz GenuineIntel GNU/Linux

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