Re: [Xen-devel] 3.0.2-testing: pci_set_dma_mask, pci_set_consistent_dma_mask(pci, 0x0fffffff) returns < 0 (ICE1712)

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 13 Apr 2006, at 20:05, Stephen C. Tweedie wrote:

> >  That
> > sorts out most kinds of bad behaviour. We would need the guest kernels
> > to help out with reclamation (at least for guests not on shadow page
> > tables). If Linux had support for hotplug memory (add and remove) I
> > suspect we could make use of that to help out, if we were careful.
> Or simply get the balloon driver to target the appropriate pages.  The
> problem with using hotplug memory is that that generally works on the
> basis of ranges of physical addresses, not machine addresses.
Is there a VM interface to allow you to say 'please terminate usage of 
*that* page'? That could be extremely useful!
 -- Keir


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