Messages in this thread | | | From | Al Boldi <> | Subject | Re: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation | Date | Fri, 13 Jul 2007 18:28:56 +0300 |
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Rafael J. Wysocki wrote: > 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.
Sounds great!
> You don't need kexec for that. This is how the userland hibernation (aka > uswsusp) works.
I don't think so. uswsusp runs under the normal kernel which implies an interdependency, whereas a device driver stub'd with a small single proc kernel would run in its own space.
The question is, how small could this kernel stub be made and still leverage the device driver pool?
Thanks!
-- Al
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