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Subject: Re: [virtio] [OASIS Issue Tracker] Created: (VIRTIO-28) Implement new balloon device (ID 13)


Daniel Kiper <daniel.kiper@oracle.com> writes:
> On Tue, Oct 29, 2013 at 11:31:58AM +1030, Rusty Russell wrote:
>> Rusty Russell <rusty@au1.ibm.com> writes:
>> > But it makes sense to put the page size in each request.  A bit more
>> > painful to implement, since the driver can't know in advance that it
>> > doesn't support a request.
>>
>> Actually, I changed my mind.
>>
>> It isn't useful to ask for different size pages.  QEMU currently does
>> all-or-nothing.  Even if it did a mix of both, it would need to tell the
>> guest which areas were which (I really want one of *these* huge pages).
>>
>> That's too much complexity for a feature which doesn't exist.  So I
>> prefer the current single-page-size model.
>
> If we assume that we could add this feature in the future
> then it is OK for me.

Yes, I don't quite know what the feature would look like, so we should
add it when we do.  It may involve specifying pfn ranges, as well as
sizes which the balloon wants..

Cheers,
Rusty.



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