On Tue, Jan 29, 2019 at 05:33:30PM +0800, WangJie (Pluto) wrote:
> Hi,
>
> Migrate feature have a restrict: target domain iothreads count
> must match source
>
> The relevant code as follows:
>
> ------------------------------------
>
> if (src->niothreadids != dst->niothreadids) {
> virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Target domain iothreads count
> %zu does not " "match source %zu"), dst->niothreadids, src->niothreadids);
> goto error; }
>
>
> ------------------------------------
>
> I tried to remove the restrict, and perform migrate in that case:
> "target domain iothreads count does not match source" , Anything
> is normal!
>
> So, can we remove the restrict to support this case?
The number of i/o threads is not part of the vm state sent during
migration, nor exposed to the guest ABI, so this restriction is a
mistaken in libvirt. We should remove that bit of code.
Regards,
Daniel
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