Re: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation

Rafael J. Wysocki
2007-07-13T11:53:53Z

On Friday, 13 July 2007 19:32, Huang, Ying wrote:
> On Thu, 2007-07-12 at 20:06 -0700, david@lang.hm wrote:
> > >> I agree, a stipped down hibernate kernel can be very small, not allocating
> > >> this memory until it's needed is a step for the final polishing.
> > >
> > > I'm not sure if I agree with that. In any case, having to use two different
> > > kernels for hibernation would be a big drawback.
> >
> > I see it as a big advantage to not have to use the main kernel for the
> > suspend. please keep it as an option at least.
>
> Yes. It has additional bonus to make it possible to write/read image
> from a program other than main kernel. For example, for a specific
> mobile device product (Such as Intel MID), a customized ultra-small
> program (or kernel) can be composed to write/read image. That way, the
> hibernate/resume time can be reduced to minimal.

You don't need kexec for that. This is how the userland hibernation (aka
uswsusp) works.

Greetings,
Rafael

--
"Premature optimization is the root of all evil." - Donald Knuth