Re: 2.6.12-mm1: BUG() in fd_install, RCU related?

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > I got 
> > 
> > Jun 21 10:30:20 amd kernel: ------------[ cut here ]------------
> > Jun 21 10:30:20 amd kernel: kernel BUG at fs/open.c:935!
> > Jun 21 10:30:20 amd kernel: invalid operand: 0000 [#1]
> > Jun 21 10:30:20 amd kernel: Modules linked in: ipw2100
> > Jun 21 10:30:20 amd kernel: CPU:    0
> > Jun 21 10:30:20 amd kernel: EIP:    0060:[page_referenced+39/160]    Not tainted VLI
> > Jun 21 10:30:20 amd kernel: EFLAGS: 00010286   (2.6.12-mm1)
> > Jun 21 10:30:20 amd kernel: EIP is at fd_install+0x27/0x40
> > Jun 21 10:30:20 amd kernel: eax: f7268e00   ebx: 00000080   ecx: f61a9800   edx: f6106400
> 
> This has been reported by several other people.
> I am looking at it except that I can't reproduce it with the config
> files in one of those bug reports. Probably whatever userland triggers
> this bug isn't in my lab machine. Besides I am running really old
> userland anyway. I am going to find a box with  newer userland
> and try.
> 
> Some things are common - always with fcntl() or fcntl64() and with
> a daemon. Does your box come up at all ? If so, can you get me an
> strace on the process that triggers this ? If I can narrow it
> down to a small testcase, it would be a lot easier. Also, does
> switching off CONFIG_PREEMPT fix this problem ?

It is not reproducible for me. My machine came up, I worked for hour
or so, then seen this one. It is still usable (I did not reboot yet).

I do not see report which process is causing it :-(, original oops does
not contain it AFAICS.

								Pavel
-- 
teflon -- maybe it is a trademark, but it should not be.