[Xen-users] xm vcpu-set doesn't work

[Pepo Viola <pepoviola@xxxxxxxxx>]

Hi all, 
       I can't change the number of vcpu with this command, when I run the command gives no error, but does not update the amount of vcpus.
The version of the xen is 3.2.1 running on Debian 5.
This is the vm config file:

name = 'vm-999998'
memory = '512'
disk = [ 'file:xxxxx.root,hda,w',
         'file:xxxxxx1.swap,hdb,w',
         'file:xxxxxx2.opt,hdc,w' ]
vif = [ 'mac=00:16:3e:xx:xx:xx, bridge=xenbrxxx', ]
vfb = [ 'type=vnc,vncpasswd=xxxx,vncdisplay=xxx']
root = '/dev/hda1'
extra = 'ro xencons=xvc video=xenfb'
kernel = '/opt/vm-manager/kernel-domU-64'
vcpus=2
maxvcpus=4
>
on_reboot   = 'restart'
on_crash    = 'restart'
cpu_cap = '100'
cpu_weight = 256

==============

This is the patched function (file XendDomainInfo.py):

(...)
    def setVCpuCount(self, vcpus):
        if vcpus <= 0:
            raise XendError('Invalid VCPUs')

        self.info['vcpu_avail'] = (1 << vcpus) - 1
        if self.domid >= 0:
            self.storeVm('vcpu_avail', self.info['vcpu_avail'])
            # update dom differently depending on whether we are adjusting
            # vcpu number up or down, otherwise _vcpuDomDetails does not
            # disable the vcpus
            if self.info['VCPUs_max'] > vcpus:
                # decreasing
                self._writeDom(self._vcpuDomDetails())
                self.info['VCPUs_live'] = vcpus
            else:
                # same or increasing
                self.info['VCPUs_live'] = vcpus
                self._writeDom(self._vcpuDomDetails())
        else:
            self.info['VCPUs_live'] = vcpus
            self.info['VCPUs_max'] = vcpus
            xen.xend.XendDomain.instance().managed_config_save(self)
        log.info("Set VCPU count on domain %s to %d", self.info['name_label'],
                 vcpus)
(...)

==============================================
When I run the command (xm vcpu-set) i see this log:

#xm list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  1000     8     r-----   5252.7
vm-999998                                    6   512     2     -b----     30.7

#xm vcpu-set vm-999998 1

( tail /var/log/xen/xend.log )
[2009-06-08 09:23:02 32568] TRACE (XendDomainInfo:1039) XendDomainInfo.storeChanged
[2009-06-08 09:23:02 32568] INFO (XendDomainInfo:1176) Set VCPU count on domain vm-999998 to 1

xm list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  1000     8     r-----   5253.2
vm-999998                                    6   512     2     -b----     30.7


Regards 

Viola Villanueva Javier.-

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