Anthony Liguori wrote:
And also, because memory hotplug and 64-bit PCI BARs require
reserving an infinite virtual address space range. Not to mention
that someone needs to update the dirty bitmap in case we're live
migrating.
You can certainly hotplug to the next RAM address so it doesn't
require infinite space.
But you need to reserve that space to prevent mallocs from going there.
How much space do you reserve?
You wouldn't send a packet from/to a PCI IO region so I don't think
that practically speaking that's a problem.
If we implement interguest shared memory as a pci device, then it
becomes a problem.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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