Bug 31742 - got a "kernel BUG at fs/dcache.c:440!"
Summary: got a "kernel BUG at fs/dcache.c:440!"
Status: RESOLVED OBSOLETE
Alias: None
Product: File System
Classification: Unclassified
Component: ext4 (show other bugs)
Hardware: x86-64 Linux
: P1 normal
Assignee: fs_ext4@kernel-bugs.osdl.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-03-23 15:14 UTC by Mathias Rüdiger
Modified: 2012-08-20 15:14 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.38
Subsystem:
Regression: No
Bisected commit-id:

Attachments
Picture of the Message (131.51 KB, image/jpeg)
2011-03-23 15:15 UTC, Mathias Rüdiger 		Details
Python script used (1.03 KB, text/plain)
2011-03-23 15:18 UTC, Mathias Rüdiger 		Details
kernel config (2.6.38+) (74.03 KB, text/plain)
2011-03-23 15:20 UTC, Mathias Rüdiger 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Mathias Rüdiger 2011-03-23 15:14:29 UTC 
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
Comment 1 Mathias Rüdiger 2011-03-23 15:15:41 UTC 
Created attachment 51752 [details]
Picture of the Message
Comment 2 Mathias Rüdiger 2011-03-23 15:18:02 UTC 
Created attachment 51762 [details]
Python script used
Comment 3 Mathias Rüdiger 2011-03-23 15:20:22 UTC 
Created attachment 51772 [details]
kernel config (2.6.38+)
Comment 4 Theodore Tso 2011-03-23 19:31:19 UTC 
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
Comment 5 Mathias Rüdiger 2011-03-23 23:45:49 UTC 
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
Comment 6 Mathias Rüdiger 2011-03-24 08:51:46 UTC 
Just checked the script on my other machine. The error didn't occurred there.
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