Bug 31742

Summary:	got a "kernel BUG at fs/dcache.c:440!"
Product:	File System	Reporter:	Mathias Rüdiger (ruediger)
Component:	ext4	Assignee:	fs_ext4 (fs_ext4)
Status:	RESOLVED OBSOLETE
Severity:	normal	CC:	alan, tytso
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	2.6.38	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Picture of the Message Python script used kernel config (2.6.38+)

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.