[PATCH 2/2] kexec jump -v10: save/restore device state

Vivek Goyal vgoyal at redhat.com
Wed May 28 08:57:42 EDT 2008

On Thu, May 22, 2008 at 05:38:19PM +0800, Huang, Ying wrote:

> Known issues:
> - Can not work with the new devices hibernation operations in
>   2.6.26-rc2-mm1 so far. Working on this now.
> - APIC is not put into legacy mode during kexec, so kexec may failed
>   (no IRQ) if APIC is not put into legacy mode.
> - The suspend/resume callback of device drivers are used to put
>   devices into quiescent state. This will unnecessarily (possibly
>   harmfully) put devices into low power state. This is intended to be
>   solved by separating device quiesce/unquiesce callback from the
>   device suspend/resume callback.
> - Because the segment number supported by sys_kexec_load is limited,
>   hibernation image with many segments may not be load. This is
>   planned to be eliminated by adding a new flag to sys_kexec_load to
>   make a image can be loaded with multiple sys_kexec_load invoking.

These two patches look good to me. I think once you have worked out
issues with IOAPIC and generated patches for compatibility with
new suspend/resume callbacks, these patches are good enough to get
some testing going on in -mm tree.

I will also test out -v10 very soon.


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