[linux-pm] Re: [RFC][PATCH 1/2 -mm] kexec based hibernation -v3: kexec jump

Jeremy Maitin-Shepard jbms at cmu.edu
Fri Sep 21 17:08:49 EDT 2007

"Rafael J. Wysocki" <rjw at sisk.pl> writes:

> On Friday, 21 September 2007 22:26, Jeremy Maitin-Shepard wrote:
>> "Rafael J. Wysocki" <rjw at sisk.pl> writes:
>> [snip]
>> > The ACPI NVS area is explicitly marked as reserved and we don't save it.
>> > On x86_64 we don't save any memory areas marked as reserved and yet the
> above
>> > happens.
>> I think you have mentioned before, though, that ACPI is first
>> initialized by the boot kernel, before it is later initialized by
>> resuming kernel.  This could well be the source of the problem.

> No, it's not.  I have tested that too with an ACPI-less boot kernel.

Well, it seems that there just must be some other bug.  I would define
anything that differs between the post-resume initialization of ACPI from
the normal boot initialization of ACPI as a bug.  If the interaction
with the hardware is the same, then the behavior will be the same.

Jeremy Maitin-Shepard

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