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Re: [Xen-devel] Is: PVH - how to solve maxmem != memory scenario? Was:Re: [PATCH] libxl: create PVH guests with max memory assigned
>>> On 05.08.14 at 17:56, <konrad.wilk@xxxxxxxxxx> wrote:
> On Tue, Aug 05, 2014 at 04:51:02PM +0100, Jan Beulich wrote:
>> >>> On 05.08.14 at 17:40, <konrad.wilk@xxxxxxxxxx> wrote:
>> > Thought for PV we do allow ballooning and PCI passthrough as we can
>> > at least control that the pages that are being ballooned are not going
>> > to be used for DMA operations (unless the guest does something stupid
>> > and returns an page back to the allocated but still does DMA ops on
>> > the PFN).
>>
>> And it would seem possible to permit the combination for PVH if
>> there was a documented requirement for the ballooning down to
>> happen before any device I/O starts.
>
> The same requirement should be applied to a normal PV guest as well.
Not really, as there's no PoD in that case.
Jan
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