>>> On 12.06.13 at 13:23, Ian Campbell <ian.campb...@citrix.com> wrote: > On Wed, 2013-06-12 at 11:07 +0100, Jan Beulich wrote: >> As there's no accessible guest kernel command for HVM guests, >> did you mean to require the guest admin to put something on the >> command line manually? > > Yes, as a workaround for this shortcoming of 4.3, not as a long term > solution. It's only people using passthrough with certain devices with > large BARs who will ever trip over this, right?
Yes. >> And then - this might cover Linux, but what about other OSes, >> namely Windows? > > True, I'm not sure if/how this can be done. > > The only reference I could find was at > http://windows.microsoft.com/en-id/windows7/using-system-configuration > which says under "Advanced boot options": > PCI Lock. Prevents Windows from reallocating I/O and IRQ > resources on the PCI bus. The I/O and memory resources set by > the BIOS are preserved. > > Which seems to suggest the default is to reallocate, but I don't know. Without having known of this option, I would take it as "may", not "will" reallocate. Jan
