Re: possible BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



[Udo van den Heuvel - Sat, Dec 01, 2007 at 12:00:53PM +0100]
| Hallo Cyrill,
| 
| Cyrill Gorcunov wrote:
| > | I made a do while loop doing make bzImage modules and a make clean.
| > | Should be OK?
| > | 
| > 
| > well, test the patch enveloped. if the bug is really heppens then
| > BUG message should appear. and the thing is much important - does
| > that bug appears on the same actions (make bzImage and etc..) on pure
| > kernel? or that happened from time to time?
| 
| I only had teh bug once, that was the reason for my post.
| Since then the system has been busy, with intervals, doing kernel
| compiles and no repeat of the BUG yet...
| It's a VIA EN12000 with 1GB of RAM. How could I increase the chances of
| hitting it?
| 
| 
| Kind regards,
| Udo
|

Hi Udo,

if my guessing is right - the only chance to hit it faster - is to increase
files' activity i.e. compiling the kernel involves a lot of file being readed
thru dcache system. First we have to locate the bug on a pure kernel
and 'case it's a rare thing to happen... well I don't really know how to
get it up to known point. So i think you could play with a pure kernel
by compiling it or run several copies of 'grep' thru kernel searching
the same pattern like "grep -r -n for ./*" in kernel sources. But Udo,
I'm not a kernel specialist so my suggestions could be not really usefull ;)

And as only you have found "approximated events" when the bug happend -
then we could try the same actions with my latest patch applied to find
if it happening exactly in dcache system. (damn, so many *if* there ;)

if you will not find that bug being reproducible in a simple way - just
leave all as it is, i'm trying to find problems in dcache system by code
reading.

P.S.
Lets CC LKML - that could help us ;)

		Cyrill

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux