Re: [Qemu-devel] [PATCH v4 0/6] spapr/xics: fix migration of older machine types

[David Gibson]

On Thu, Jun 08, 2017 at 03:42:32PM +0200, Greg Kurz wrote:
> I've provided answers for all comments from the v3 review that I deliberately
> don't address in v4.

I've merged patches 1-4.  5 & 6 I'm still reviewing.

> 
> v4: - some patches from v3 got merged
>     - added some more preparatory cleanup in xics (patches 1,2)
>     - merge cpu_setup() handler into realize() (patch 4)
>     - see individual changelog for patches 3 and 6
> 
> v3: - preparatory cleanup in pnv (patch 1)
>     - rework ICPState realization and vmstate registration (patches 2,3,4)
>     - fix migration using dummy icp/server entries (patch 5)
> 
> v2: - some patches from v1 are already merged in ppc-for-2.10
>     - added a new fix to a potential memory leak (patch 1)
>     - consolidate dt_id computation (patch 3)
>     - see individual changelogs for patch 2 and 4
> 
> I could successfully do the following on POWER8 host with full cores (SMT8):
> 
> 1) start a pseries-2.9 machine with QEMU 2.9:
>         -smp cores=1,threads=2,maxcpus=8
> 2) hotplug a core:
>         device_add host-spapr-cpu-core,core-id=4
> 3) migrate to QEMU 2.10 configured with core-id 0,4
> 4) hotplug another core:
>         device_add host-spapr-cpu-core,core-id=2
> 5) migrate back to QEMU 2.9 configured with core-id 0,4,2
> 6) hotplug the core in the last available slot:
>         device_add host-spapr-cpu-core,core-id=6
> 7) migrate to QEMU 2.10 configured with core-id 0,4,2,6
> 
> I could check that the guest is functional after each migration.
> 

-- 
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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