Re: [linux-pm] Re: [patch] hibernation: utilize ACPI hardware signature

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Thursday, 3 of January 2008, Nigel Cunningham wrote:
> Hi.
> 
> Rafael J. Wysocki wrote:
> >> I suppose we can always disable this when we start to support hardware
> >> changing over hibernate (I have ideas in this direction - memory cold
> >> plugging, for a start).
> > 
> > Well, if we support such features, we won't be following ACPI any more.
> 
> Mmm. Apparently I'm not as focused on specs as you :).
> 
> I was starting to think through whether it could make for a new and much
> faster was to boot live cds - something along the lines of complete
> redetection of hardware and memory cold plugging. Of course it's only in
> the 'I wonder if this would be possible' stage at the mo, but seemed at
> least feasible - keep the e820 tables from boot, make _init routines not
> get thrown away and do something like the kexec device shutdown etc
> around an atomic restore.
> 
> I know there'd be limitations, but perhaps worth thinking about...

Well, what if the new e820 map is incompatible with the old one?

Rafael