Kexec + power kernel = kernel swap without need for full reboot?
 

There are at least 3 kernels in use on the N900: the stock pr1.3 kernel, kp49 and kp50. Often I boot into one, only to realize I needed something from another (such as the bleeding-edge wifi drivers). So I reboot.
There is a program called kexec, which allows for the loading of one linux kernel from another. And it is in the Maemo repositories as well. If I understand correctly, this would allow for a uboot-like system to be implemented in userspace - so we could have an app to select what to reboot to with a nice touchscreen interface, and no need for risky kernel flashing. (If a kernel loaded by kexec is broken, a full reset [taking the battery out and putting it back in] will load the original kernel from the flash memory.)

Does this sound feasible? Also, would anyone be interested in such an app?

Re: Kexec + power kernel = kernel swap without need for full reboot?
 

This would be feasible only if all kernels support kexec but i doubt that
the original Nokia kernel has kexec enabled.

Re: Kexec + power kernel = kernel swap without need for full reboot?
 

Has anyone even had kexec even work on device?

Re: Kexec + power kernel = kernel swap without need for full reboot?
 

Isn't it easier and more convenient to update bleeding-edge drivers instead? ;)

Re: Kexec + power kernel = kernel swap without need for full reboot?
 

Nokia's Kernel PR1.3 has kexec support.