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Re: [Libvir] [PATCH] check the maximum of virtual CPU



Masayuki Sunou wrote:
Hi

The maximum of virtual CPU is not guarded in virsh setvcpus now.
Then, when 32767 was set to virtual CPU of virsh setvcpus, the problem
that Xend became abnormal was detected.

example:
----------------------------------------------------------------------
  # virsh setvcpus 0 32767
  libvir: Xen Daemon error : POST operation failed: (xend.err "(9, 'Bad file descriptor')")
  libvir: Xen error : failed Xen syscall  ioctl  3166208
  libvir: error : library call virDomainSetVcpus failed, possibly not supported
# xm list -l
  Error: (9, 'Bad file descriptor')
  Usage: xm list [options] [Domain, ...]
List information about all/some domains.
    -l, --long                     Output all VM details in SXP
    --label                        Include security labels
    --state=<state>                Select only VMs with the specified state
----------------------------------------------------------------------


Therefore, I propose the correction that adjusts the maximum of virtual
CPU to the same value as Xen.

This patch is over 200lines.
If you request, I am ready to repost it with split this patch.

The patch looks pretty sensible to me. Needs the same check added to virt-manager too?

Rich.

--
Emerging Technologies, Red Hat  http://et.redhat.com/~rjones/
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 "[Negative numbers] darken the very whole doctrines of the equations
 and make dark of the things which are in their nature excessively
 obvious and simple" (Francis Maseres FRS, mathematician, 1759)

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