[LITMUS^RT] Fwd: LITMUS installation error in Virtual box

[Glenn Elliott]

On Nov 6, 2013, at 3:05 PM, Srivatsan Varadarajan <srivatsan3290 at gmail.com> wrote:

> Hi,
> 
> Kindly help me in resolving this issue.
> 
> Thanks
> Srivatsan Varadarajan
> 
> ---------- Forwarded message ----------
> From: Srivatsan Varadarajan <srivatsan3290 at gmail.com>
> Date: Wed, Nov 6, 2013 at 1:33 PM
> Subject: LITMUS installation error in Virtual box
> To: litmus-dev at lists.litmus-rt.org
> 
> 
> Hi,
> 
> I am a newbie to Linux Kernel patching. I am doing project on "Comparison of Various RT Schedulers" for which i downloaded LITMUS RT, patched it as per the instructions, and compiled the Kernel in Virtual box.
> 
> However, when i restart the Linux OS in virtualbox, I am getting Kernel panic error. Please find attached the screenshot. 
> 
> Kindly help me in resolving this issue.
> 
> Thanks and Regards
> Srivatsan Varadarajan
> 
> <ubuntu_kernel panic.png>_______________________________________________
> litmus-dev mailing list
> litmus-dev at lists.litmus-rt.org
> https://lists.litmus-rt.org/listinfo/litmus-dev



I think I remember a question to the mailing list about this problem on VirtualBox before, but I can’t find it in the archive.  In the kernel configuration LITMUS^RT > Performance Enhancements, deselect “Local Migration Affinity”.  I believe this will disable the offending code.  It’s not an ideal solution, but it may get you started in a virtualized environment.  Please be aware that you can use a virtual environment to test and debug Litmus, but real-time performance will be spotty due to inaccurate timers and reliance upon the scheduling of the virtual machine.  You could also try Litmus out in KVM/Qemu (we use KVM/Qemu all the time).

-Glenn
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