Re: 4.7 qemu regression: HVM guests fail to boot from xvda

[Olaf Hering <olaf@aepfle.de>]

On Tue, Jun 07, George Dunlap wrote:

> In every part of the whole system -- in dom0, in the guest, in
> everything -- I use xvda; *except* in the parts dealing with the guest
> config, where for some reason I mysteriously put 'hda', which ends up
> producing an xvda either when booted PV or when booted HVM.  Does that
> make any sense?

hd|xvd in domU.cfg will be ignored by a pvops kernel, it always uses xvd
as prefix.

> What about a per-disk property, emulate={default,always,only}, which for
> HVM will do the things we're talking about and be ignored on PV?
> 'default' will behave as it does now: xvda will get you only PV, hda
> will get you PV-backed emulated.  'always' will always give you an
> emulated device even if you specify xvda, and 'only' will only give you
> an emulated device (with no PV).

I was hoping to use existing xl.cfg statements so that a given domU.cfg
can be shared across toolstack versions.

I will look into this now, as stated last week.

Olaf

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