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Re: [Xen-devel] [PATCH v5 2/3] pc & q35: Add new machine opt max-ram-below-4g


> > IMO xen should use a versioned machine type to make live migration more
> > reliable.  IIRC this was discussed anyway for other reasons (see
> > xen-platform-pci discussions, picking pc-i440fx-1.6 IIRC).
> That is happening as far as I know and does not directly impact this
> patch set.
> >    That should
> > also make qemu use the memory layout expected by old xen.
> Currently xen just ignores the memory layout that QEMU sets up
> and does it's own way.  So no, this does not make QEMU use the
> memory layout expected by old xen.

Why?  "-M pc-i440fx-1.6" will make qemu use the same memory layout it
used to have before gbalign support was added.  And that should match
what old xen versions are setting up ...


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