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SubjectRe: [Xen-devel] [PATCH v2 1/2] x86: respect memory size limiting via mem= parameter

* Juergen Gross <> wrote:

> > If PCI devices had physical mmio memory areas above this range, we'd
> > still expect them to work - the option was really only meant to limit
> > RAM.
> No, in this case it seems to be real RAM added via PCI. The RAM is
> initially present in the E820 map, but the "mem=" will remove it from
> there again. During ACPI scan it is found (again) and will be added via
> hotplug mechanism, so "mem=" has no effect for that memory.

OK. With that background:

Acked-by: Ingo Molnar <>

I suppose you want this to go upstream via the Xen tree, which is the
main testcase for the bug to begin with?



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