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SubjectRE: Switching Kernels without Rebooting?

Jesse Pollard wrote:

[why switching kernels is very hard, and...]

> Before you even try switching kernels, first implement a process
> checkpoint/restart. The process must be resumed after a boot
> using the same
> kernel, with all I/O resumed. Now get it accepted into the kernel.

Hear, hear! That would be a useful feature, maybe not network servers,
but for pure number crunching apps it would save people having to write
all the state saving and recovery that is needed now for long term

For bonus points, make it work for clusters to synchronously save and
restore state for the apps running on all the nodes at once...


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