Re: [PATCH 06/10] s390/cio: add basic protected virtualization support

Cornelia Huck
2019-05-16T06:32:28Z

On Wed, 15 May 2019 23:08:17 +0200
Halil Pasic <pasic@linux.ibm.com> wrote:

> On Tue, 14 May 2019 10:47:34 -0400
> "Jason J. Herne" <jjherne@linux.ibm.com> wrote:

> > Are we
> > worried that virtio data structures are going to be a burden on the 31-bit address space?
> >
> >
>
> That is a good question I can not answer. Since it is currently at least
> a page per queue (because we use dma direct, right Mimu?), I am concerned
> about this.
>
> Connie, what is your opinion?

Yes, running into problems there was one of my motivations for my
question. I guess it depends on the number of devices and how many
queues they use. The problem is that it affects not only protected virt
guests, but all guests.