RE: [Xen-devel] feature flags use

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> >That flag is treated oddly. Actually we detect if the kernel uses Elf
> notes
> >or whether it has the string PAE=yes[extended]. In either case we
notify
> the
> >hypervisor via *vm_assist*! This then decides whether or not we
advertise
> >the XENFEAT flag to the domU.
> 
> I was talking about XENFEAT_pae_pgdir_above_4gb - this flag appears to
be
> be useless.
> Also, regardless of whether you advertise support for the feature to a
> domU,
> the code inside Xen doesn't treat the two cases (kernel with and
without
> this
> flag set) differently.

The xc_linux_restore code in the tools library needs to be able to read
the feature flag from Xen.

Ian

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