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[Xen-devel] pvhvm cpu hotplug not working in xen 4.4


  • To: Xen-devel@xxxxxxxxxxxxx
  • From: Kristoffer Egefelt <kristoffer@xxxxxxx>
  • Date: Thu, 6 Mar 2014 15:16:46 +0100
  • Delivery-date: Thu, 06 Mar 2014 14:17:06 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

Is xl vcpu-set supposed to work with pvhvm in xen 4.4?

I’m trying with xen 4.4 rc-6 from git, getting libxl: error: 
libxl_qmp.c:287:qmp_handle_error_response: received an error message from QMP 
server: Not supported

Is some specific version of qemu needed?

Full output:

$ xl list
Name                                        ID   Mem VCPUs      State   Time(s)
pvhvm-template-vm101                175  7744     4     -b——       9.9

$ xl vcpu-set 175 5
libxl: debug: libxl_qmp.c:696:libxl__qmp_initialize: connected to 
/var/run/xen/qmp-libxl-175
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: qmp
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "qmp_capabilities",
    "id": 1
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: return
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "cpu-add",
    "id": 2,
    "arguments": {
        "id": 0
    }
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: error
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error 
message from QMP server: Not supported
libxl: debug: libxl_qmp.c:696:libxl__qmp_initialize: connected to 
/var/run/xen/qmp-libxl-175
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: qmp
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "qmp_capabilities",
    "id": 1
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: return
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "cpu-add",
    "id": 2,
    "arguments": {
        "id": 1
    }
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: error
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error 
message from QMP server: Not supported
libxl: debug: libxl_qmp.c:696:libxl__qmp_initialize: connected to 
/var/run/xen/qmp-libxl-175
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: qmp
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "qmp_capabilities",
    "id": 1
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: return
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "cpu-add",
    "id": 2,
    "arguments": {
        "id": 2
    }
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: error
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error 
message from QMP server: Not supported
libxl: debug: libxl_qmp.c:696:libxl__qmp_initialize: connected to 
/var/run/xen/qmp-libxl-175
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: qmp
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "qmp_capabilities",
    "id": 1
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: return
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "cpu-add",
    "id": 2,
    "arguments": {
        "id": 3
    }
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: error
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error 
message from QMP server: Not supported
libxl: debug: libxl_qmp.c:696:libxl__qmp_initialize: connected to 
/var/run/xen/qmp-libxl-175
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: qmp
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "qmp_capabilities",
    "id": 1
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: return
libxl: debug: libxl_qmp.c:546:qmp_send_prepare: next qmp command: '{
    "execute": "cpu-add",
    "id": 2,
    "arguments": {
        "id": 4
    }
}
'
libxl: debug: libxl_qmp.c:296:qmp_handle_response: message type: error
libxl: error: libxl_qmp.c:287:qmp_handle_error_response: received an error 
message from QMP server: Not supported
xc: debug: hypercall buffer: total allocations:9 total releases:9
xc: debug: hypercall buffer: current allocations:0 maximum allocations:2
xc: debug: hypercall buffer: cache current size:2
xc: debug: hypercall buffer: cache hits:7 misses:2 toobig:0


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