[LITMUS^RT] Kernel panic with current Qemu image and kernel's sample configuration file

[Pagani, Santiago (IPR)]

Hi,

I think I found a solution to the problem. The source error was on the invocation of the virtual machine. Apparently, this is a known problem with Qemu: http://osdir.com/ml/qemu-devel/2012-09/msg01267.html
It is solved by either removing the option "-cpu host", or changing it to "-cpu host,level=9". I'm using the latter, and everything seems to work fine, both with the original linux kernel and the LITMUS^RT patch.


Best regards,
Santiago Pagani


________________________________________
From: litmus-dev-bounces at lists.litmus-rt.org [litmus-dev-bounces at lists.litmus-rt.org] On Behalf Of Björn Brandenburg [bbb at mpi-sws.org]
Sent: 16 December 2013 08:10
To: litmus-dev at lists.litmus-rt.org
Subject: Re: [LITMUS^RT] Kernel panic with current Qemu image and kernel's      sample configuration file

On 16 Dec 2013, at 00:11, Pagani, Santiago (IPR) <santiago.pagani at kit.edu> wrote:

>
> I also tried to compile an unmodifed version of the kernel with its default configuration file, and I then used it with the same Qemu image. I'm getting the same error.

Well, this means it’s a Linux issue unrelated to LITMUS^RT. Not much we can do here, really.

> Could there be a problem in the Qemu image? Or is it a configuration problem before compiling the kernel?

Hard to tell, but it’s probably not the image. I’d try figuring out which configure option caused the code that crashed to be included (on what config option does init_hw_perf_events depend?) and then try disabling it.

- Björn


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