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New: got a "kernel BUG at fs/dcache.c:440!"

Bug 31742 [email protected] 1 participant 11 messages Mar 23, 2011 – Aug 20, 2012

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#0 lore raw

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: [email protected]
ReportedBy: [email protected]
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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#1 lore raw

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

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

--- Comment #1 from Mathias Rüdiger <[email protected]> 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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#2 lore raw

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

In reply to [email protected]

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

--- Comment #2 from Mathias Rüdiger <[email protected]> 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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#3 lore raw

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

In reply to [email protected]

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

--- Comment #3 from Mathias Rüdiger <[email protected]> 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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#4 lore raw

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

In reply to [email protected]

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

Mathias Rüdiger <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

  Attachment #51762|application/octet-stream    |text/plain
          mime type|                            |
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#5 lore raw

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

In reply to [email protected]

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

Mathias Rüdiger <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

  Attachment #51772|application/octet-stream    |text/plain
          mime type|                            |
Signature · 6 lines
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#6 lore raw

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

In reply to [email protected]

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

Mathias Rüdiger <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

           Platform|All                         |x86-64
     Kernel Version|                            |2.6.28
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#7 lore raw

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

In reply to [email protected]

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

Theodore Tso <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

                 CC|                            |[email protected]
     Kernel Version|2.6.28                      |2.6.38

--- Comment #4 from Theodore Tso <[email protected]> 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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#8 lore raw

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

In reply to [email protected]

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

--- Comment #5 from Mathias Rüdiger <[email protected]> 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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#9 lore raw

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

In reply to [email protected]

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

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

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#10 lore raw

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

In reply to [email protected]

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

Alan <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
                 CC|                            |[email protected]
         Resolution|                            |OBSOLETE
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