Re: [Qemu-devel] [PATCH v2 0/6] Fix migration issues with arbitrary cpu-hot(un)plug

[David Gibson]

On Mon, Jul 25, 2016 at 11:59:18AM +0200, Igor Mammedov wrote:
> Changes from v1:
>   - be conservative, drop QTAIL_*() macros hunks and do list element
>     check/cleanup localy in cpu_exec_exit()
>   - fix conflict caused by above
>   - update Reviewed-bys fom v1
>   - drop spapr patches as they will be a bit different and depend
>     on not yet applied to master patch:
>      'spapr: disintricate core-id from DT semantics'
> 
> Series fixes migration issues caused by unstable cpu_index which depended
> on order cpus were created/destroyed. It follows David's idea to make
> cpu_index assignable by selected boards if board supports cpu-hotplug
> with device_add and needs stable cpu_index/'migration id' but leaves
> behaviour of the same as before for users that don't care about
> cpu-hot(un)plug making changes low-risk.
> 
> tested with:
>   SRC -snapshot -enable-kvm -smp 1,maxcpus=3 -m 256M guest.img -monitor stdio 
> \
>        -device qemu64-x86_64-cpu,id=cpudel,apic-id=1 \
>        -device qemu64-x86_64-cpu,apic-id=2 
>   (qemu) device_del cpudel
>   (qemu) stop
>   (qemu) migrate "exec:gzip -c > STATEFILE.gz"
>   
>   DST -snapshot -enable-kvm -smp 1,maxcpus=3 -m 256M guest.img -monitor stdio 
> \
>       -device qemu64-x86_64-cpu,apic-id=2 \
>       -incoming "exec: gzip -c -d STATEFILE.gz"
> 
> git tree to test with:
>      https://github.com/imammedo/qemu cpu-index-stable-v2
>  to view
>      https://github.com/imammedo/qemu/commits/cpu-index-stable-v2

Eduardo,

Igor said he thought these would probably go in via your tree.  Do you
have any kind of ETA for this?

I've put these into my ppc-for-2.7 tree, not because I intend to push
them from there, but so I can do the ppc specific fixups on top of
them.  I'm hoping these will disappear in a rebase before my next pull
request.

-- 
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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