[linux-pm] [RFC][PATCH 0/2 -mm] kexec based hibernation -v3

Huang, Ying ying.huang at intel.com
Fri Sep 21 04:47:11 EDT 2007

On Fri, 2007-09-21 at 10:43 +0200, Stefan Rompf wrote:
> Am Donnerstag, 20. September 2007 07:34 schrieb Huang, Ying:
> > The hibernation procedure with the patch set is as follow:
> >
> > 1. Boot a kernel A
> >
> > 2. Work under kernel A
> >
> > 3. Kexec another kernel B (crash dump enabled) in kernel A.
> From a short glance over current Linus' arch/i386/kernel/machine_kexec.c, 
> memory for the crash dump kernel B still needs to be reserved statically when 
> booting A.
> This is one of the biggest issues with kexec based hibernation. For the 
> typical notebook user, it is totally unacceptable to reserve 16 megabytes of 
> memory just to be able to suspend to disk. And given the fact that current 
> distribution kernels are quite modular and require early module loading, even 
> more memory might be needed.
> IMHO, a plan how to fix this must exist or the concept of kexec based 
> hibernation is a waste of time.

This issue has been resolved. The implementation method details in
another mail with title as follow:

[RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump

Best Regards,
Huang Ying

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