[Bug 31742] New: got a "kernel BUG at fs/dcache.c:440!"

[Bug 31742] New: got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742

           Summary: got a "kernel BUG at fs/dcache.c:440!"
           Product: File System
           Version: 2.5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: ruediger@blueboot.org
        Regression: No


While traversing /usr with a python script, i got a message saying "kernel
BUG". Its the first time i got something like this in the last 12 years using
linux, so i guessed, i should report it. The message is attached as a jpeg.

so long
Mathias

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742





--- Comment #1 from Mathias Rüdiger <ruediger@blueboot.org>  2011-03-23 15:15:41 ---
Created an attachment (id=51752)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=51752)
Picture of the Message

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742





--- Comment #2 from Mathias Rüdiger <ruediger@blueboot.org>  2011-03-23 15:18:02 ---
Created an attachment (id=51762)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=51762)
Python script used

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742





--- Comment #3 from Mathias Rüdiger <ruediger@blueboot.org>  2011-03-23 15:20:22 ---
Created an attachment (id=51772)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=51772)
kernel config (2.6.38+)

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742


Mathias Rüdiger <ruediger@blueboot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #51762|application/octet-stream    |text/plain
          mime type|                            |




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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742


Mathias Rüdiger <ruediger@blueboot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #51772|application/octet-stream    |text/plain
          mime type|                            |




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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742


Mathias Rüdiger <ruediger@blueboot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Platform|All                         |x86-64
     Kernel Version|                            |2.6.28




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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742


Theodore Tso <tytso@mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tytso@mit.edu
     Kernel Version|2.6.28                      |2.6.38




--- Comment #4 from Theodore Tso <tytso@mit.edu>  2011-03-23 19:31:19 ---
Can you replicate the problem, or was this a once-off?

Can you say more about your hardware configuration?  Was this on an SMP
machine?

Looking at the stack trace, this looks more like a VFS level issue than
something within ext4. 

-- Ted

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742





--- Comment #5 from Mathias Rüdiger <ruediger@blueboot.org>  2011-03-23 23:45:49 ---
Yes i can replicate the problem. Start the script, wait a second and off you
go.

I am using a Thinkpad X61 Tablet
(http://www.thinkwiki.org/wiki/Category:X61_Tablet) with Intels L7300. Its a
SMP machine. 

I also thought that fs/dcache.c isn't ext4 specific, but i didn't know where to
put the bugreport.


Mathias

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742





--- Comment #6 from Mathias Rüdiger <ruediger@blueboot.org>  2011-03-24 08:51:46 ---
Just checked the script on my other machine. The error didn't occurred there.

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[Bug 31742] got a "kernel BUG at fs/dcache.c:440!"

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=31742


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |alan@lxorguk.ukuu.org.uk
         Resolution|                            |OBSOLETE




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