[linux-pm] [PATCH -mm] kexec jump -v9
pavel at ucw.cz
Sat Mar 22 12:21:10 EDT 2008
> On Fri, 21 Mar 2008, Rafael J. Wysocki wrote:
> > > > > Well, in fact ACPI has something called the NVS memory, which we're supposed
> > > > > to restore during the resume and which we're not doing. The problem may be
> > > > > related to this.
> > > >
> > > > No, it can't be. ACPI won't expect the NVS memory to be restored
> > > > following an S5-shutdown. In fact, as far as ACPI is concerned,
> > > > resuming from an S5-type hibernation should not be considered a resume
> > > > at all but just an ordinary reboot.
> > I agree here.
> > > > All ACPI-related memory areas in the boot kernel should be passed directly
> > > > through to the image kernel.
> > However, the image kernel is supposed to restore the NVS area (from the
> > image) before executing _WAK.
> It's supposed to do that when resuming from an S4 hibernation, not
> when resuming from an S5 hibernation.
> > > How can we pass interpretter state? I do not think we do this kind of
> > > passing.
> > The interpreter state is passed withing the image. The platform state is not.
> For an S5 hibernation, the interpreter state within the image is wrong.
> The image kernel needs to have the interpreter state from the boot
> kernel -- I don't know if this is possible.
yes, nosave pages could be used to do this passing -- if we can put
interpretter state into pre-allocated memory block.
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
More information about the kexec