On Thu, Nov 16, 2017 at 11:15:18AM +0200, Avi Kivity wrote:
> On 11/16/2017 11:03 AM, Gleb Natapov wrote:
> > On Thu, Nov 16, 2017 at 10:59:07AM +0200, Avi Kivity wrote:
> > > On 11/16/2017 10:55 AM, Gleb Natapov wrote:
> > > > On Thu, Nov 16, 2017 at 10:53:52AM +0200, Avi Kivity wrote:
> > > > > On 11/16/2017 10:48 AM, Nadav Har'El wrote:
> > > > > > On Fri, Nov 10, 2017 at 3:24 PM, Avi Kivity <a...@scylladb.com
> > > > > > <mailto:a...@scylladb.com>> wrote:
> > > > > >
> > > > > > OSv will need NVMe and ena drivers.
> > > > > >
> > > > > >
> > > > > > Why is that, have you seen documentation (or saw in your own tests)
> > > > > > that
> > > > > > they will not support virtio-blk and virtio-net on their KVM?
> > > > > It will not be supported, native drivers only.
> > > > >
> > > > Do you know why is that?
> > > I can guess that they prefer to support one set of devices/drivers rather
> > > than two. Native will have far better performance, so why bother?
> > >
> > New instances will have new HW, so in the end they will have to support
> > more than one set of drivers anyway.
> >
> > > > What about migration?
> > > >
> > > Migration from what? Old AMIs aren't guaranteed to support virtio.
> > >
> > Live migration for high availability. Although I am not sure that was
> > supported with XEN.
>
> Xen supports migration, But AWS does not.
>
Sure. I meant XEN AWS instances migration support status.
> I think they could, since those "native" interfaces are actually terminated
> in their Annapurna chips, not the actual hardware, so they can program those
> chips to perform live migration.
>
Don't you need DMA "page fault" support for that. Do you know what is
its status? Although with custom HW something non standard can be hacked
probably. But NVMe is not produced by Amazon.
--
Gleb.
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