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:

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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; }

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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 -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|