Re: [PATCH] docs: clarify that virsh setvcpus and setmem only work on active domains

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On 13/01/2011, at 8:54 AM, Eric Blake wrote:
<snip>
>> +B<Note>, this command only works on active guest domains.  To change the
>> +number of virtual CPUs in a inactive guest domain, use the virsh B<edit>
>> +command to update the XML <vcpu> element.
> 
> When I did the setvcpus work, my intention was that the --config option
> was to allow changing vcpu allocation without requiring a running
> domain, insofar as things are implemented by the hypervisor.  If we have
> cases where the behavior still doesn't match those intentions, we
> probably ought to fix the bugs, rather than documenting that this
> command is live-only.  So I'm thinking this paragraph doesn't belong.

Think I've found a bug here.  With an inactive domain "Fedora_14_x64",
attempting without the --config option gives the expected error message:

  virsh # setvcpus Fedora_14_x64 4
  error: Requested operation is not valid: domain is not running

But trying other flags (such as --maximum) don't:

  virsh # setvcpus Fedora_14_x64 4 --maximum
  error: invalid argument in virDomainSetVcpusFlags

Should that be giving the "domain is not running" error as well?

Note, using the --config option with the --maximum option works:

  virsh # setvcpus Fedora_14_x64 4 --maximum --config

So the "invalid argument" error seems bogus.


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