Kernel 2.6 Oops

ph03n1x · l33t Joined: 06 Feb 2003 Posts: 756

Hi there

I compiled kernel 2.6 today it seemed to run but sometimes, especially when emerging stuff it just stops saying something about Oop

I dont know what exactly Oop is but afaik this happens when the kernel has serious trouble

What can I do to figure out where the problem is? What logs do I have to check?

thx

Btw: What about a kernel section on gentoo forums? With the new 2.6 kernel a lot of people seem to have problems and I dunno where I should post kernel relating stuff...

pjp · Administrator Joined: 16 Apr 2002 Posts: 20589

Other Things Gentoo is currently home to post-installation kernel questions.

Moved from Installing Gentoo.
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vdboor · Posted: Mon Jan 19, 2004 2:17 pm Post subject:

Story answer:
A kernel oops is a bug in the kernel, perhaps caused by your kernel setup, or combination of hardware.. Unfornately, I don't know the procedure to report these errors to the linux-kernel-mailinglist.

Long answer:
If a program tries to read memory address 0, or any other invalid address, it receives a SIGSEGV from the kernel, and exits with a crash message. Programmers also call this a null-pointer exception. This situation occurs if a calculation failed, program data isn't initialized by the programmer, or the program runs into a point where it obviously doesn't have a correct response for the situation.

The same could happen to the kernel... because it's just another program, it could have the same problems. The kernel shouldn't kill itself with a SIGSEGV off course, that's why it emits a kernel-oops instead. ..and somehow magically, the kernel able to keep running after this happened!

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ph03n1x · l33t Joined: 06 Feb 2003 Posts: 756

Ok thx for the info so far

But my kernel stops working after that oop... and the screen shows a weird line, maybe video problem?

However any ideas where i could find more info on the oop (which logs, etc)

thx

_Nomad_ · Guru Joined: 11 Apr 2003 Posts: 571

If you get a hard freeze then your logs will most likely be empty. I suggest that you recompile your kernel since it is probably something misconfigured there...

Could you post your hardware and what kernel version/config you are using?

vdboor · Posted: Tue Jan 20, 2004 9:39 am Post subject:

The kernel posts a message in the console. If you're in X, you can't see any message, and most likely just see X being locked completely. (note that not every X-lock is caused by a kernel oops :p)
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ph03n1x · l33t Joined: 06 Feb 2003 Posts: 756

Bad thing is the oops happened when i was using the console... I'm using kernel 2.6.1 from the dev-sources, will check my config again today and then recompile... thx for the help so far