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Re: [Qemu-ppc] [Qemu-devel] [PATCH 3/3] tests/acceptance/migration: test
From: |
David Gibson |
Subject: |
Re: [Qemu-ppc] [Qemu-devel] [PATCH 3/3] tests/acceptance/migration: test to migrate will all machine types |
Date: |
Wed, 18 Sep 2019 10:46:42 +1000 |
User-agent: |
Mutt/1.12.1 (2019-06-15) |
On Tue, Sep 17, 2019 at 10:44:25AM +0100, Dr. David Alan Gilbert wrote:
> * Balamuruhan S (address@hidden) wrote:
> > On Mon, Sep 16, 2019 at 03:50:06PM +0100, Dr. David Alan Gilbert wrote:
> > > * Balamuruhan S (address@hidden) wrote:
> > > > add migration test to query machine types supported by qemu binary
> > > > and migrate vm will all supported type.
> > > >
> > > > Signed-off-by: Balamuruhan S <address@hidden>
> > >
> > > Depending on the architecture you might find that some machine types
> > > aren't migratable while some are.
> >
> > Thanks Dave, is there a way to query/check whether a machine type on the
> > architecture is migratable or should we try migrating and handle exception
> > on failure ?
>
> I don't know a way to detect it; you can add -only-migratable to get
> qemu to fai early if a device is declared as being non-migratable; but
> that still doesn't say that all the devices have actually been tested
> migrating.
At present we kind of have an informal distinction between those
machine types that are mature and maintained enough to support
migration (which I think is just pc, q35, pseries and arm virt) and
those which aren't.
There isn't, as far as I know, a way to detect this.
I know we've mentioned at least briefly the idea of formalizing this
distinction at qemu summit, but I don't think the discussion went
anywhere.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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[Qemu-ppc] [Qemu-devel] [PATCH 1/3] tests/acceptance/migration: fix post migration check, Balamuruhan S, 2019/09/16