khibernation - kexec based hibernation
Kexec base hibernation has some potential advantages over u/swsusp and

TuxOnIce (suspend2). Some of them are as follow:
1. The hibernation image size can exceed half of memory size

   easily. This is possible with TuxOnIce, but impossible with

   u/swsusp.
2. It is possible to eliminate freezer from kexec based hibernation

   implementation, after corresponding changes to device drivers are

   done.
3. Based on kexec/kdump implementation, the kernel code needed is

   less.
Now, only the i386 architecture is supported. The patchset is based on

Linux kernel 2.6.24-rc2-mm1, and has been tested on IBM T42 with ACPI

on and off.
The following user-space tools are needed to implement hibernation and

resume.
1. kexec-tools needs to be patched to support khibernation. The patches

   and the precompiled kexec can be download from the following URL:

       source: http://khibernation.sourceforge.net/download/release_v6/kexec-tools/kexe...

       patches: http://khibernation.sourceforge.net/download/release_v6/kexec-tools/kexe...

       binary: http://khibernation.sourceforge.net/download/release_v6/kexec-tools/kexe...
2. makedumpfile with patches are used as memory image saving tool, it

   can exclude free pages from hibernation image file. The patches and

   the precompiled makedumpfile can be download from the following

   URL:

       source: http://khibernation.sourceforge.net/download/release_v6/makedumpfile/mak...

       patches: http://khibernation.sourceforge.net/download/release_v6/makedumpfile/mak...

       binary: http://khibernation.sourceforge.net/download/release_v6/makedumpfile/mak...
3. A simplest memory image restoring tool named "krestore" is

   implemented. It can be downloaded from the following URL:

       source: [ message continues ]