Hi! > > > > The features of this patch can be used for as follow: > > > > > > > > - A simple hibernation implementation without ACPI support. You can > > > > kexec a hibernating kernel, save the memory image of original system > > > > and shutdown the system. When resuming, you restore the memory image > > > > of original system via ordinary kexec load then jump back. > > > > > > > > > > The main usage of this functionality is for hibernation. I am not sure > > > what has been the conclusion of previous discussions. > > > > > > Rafael/Pavel, does the approach of doing hibernation using a separate > > > kernel holds promise? > > > > Its certainly "more traditional" method of doing hibernation than > > tricks swsusp currently plays. > > What exactly are you referring to? Well, traditionaly it is 'A saves B to disk' (like bootloader saves kernel&userspace). In swsusp we have 'kernel saves itself'... which works, too, but is pretty different design. > > Now, I guess they are some difficulties, like ACPI integration, and > > some basic drawbacks, like few seconds needed to boot second kernel > > during suspend. > > > > ...OTOH this is probably only chance to eliminate freezer from > > swsusp... > > Some facts: > > * There's no reason to think that we can't use this same mechanism for > hibernation (the only difficulty seems to be the handling of devices used for > saving the image). Ok, at least kexec makes handling of suspend device easier. > Moreover, if this had been the _only_ argument for the $subject functionality, > I'd have been against it. Fortunately its not the only one :-). -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
