kexec for Bifferboard

[Razvan Dragomirescu]

Hello everyone,

 

Has anyone else tried to use the kexec call on the Bifferboard to start a new kernel to replace the existing one? I've compiled the "kexec" utility from kexec-tools 2.0.1 (a statically linked version is at http://www.cayennegraphics.com/kexec if anyone else needs it) and also compiled the kernel with KEXEC enabled.

 

Then I tried to load a kernel

 

kexec --append="`cat /proc/cmdline`" -l bzImage

 

This worked fine, no errors.

 

But when I tried to execute the new kernel with "kexec -e", the console displays a message "Starting new kernel" and then freezes. The new kernel doesn't get booted at all and the Bifferboard is completely frozen. I suspect this has to do with the specific hardware of the Bifferboard. Has anyone else been successful at loading a new kernel with kexec? This would be very useful if you wanted to not touch the internal flash and simply place a generic kernel there and kexec a new kernel + initrd from the USB disk.

 

Thanks,

Razvan

--
Razvan Dragomirescu
Chief Technology Officer
Cayenne Graphics SRL

[bifferos]

The place I'd start looking would be the config for the new kernel.
One example: none of the kernels I use are relocatable - this saves
about 5-10% on the kernel size, but may present a problem for kexec -
e. I'm only guessing, and I suspect you want to take this up with the
kexec people as they'll have a better idea of what you need to do.

cheers,
Biff.

On Aug 30, 11:51 am, Razvan Dragomirescu

<razvan.dragomire...@gmail.com> wrote:
> Hello everyone,
>
> Has anyone else tried to use the kexec call on the Bifferboard to start a
> new kernel to replace the existing one? I've compiled the "kexec" utility

> from kexec-tools 2.0.1 (a statically linked version is athttp://www.cayennegraphics.com/kexecif anyone else needs it) and also