From: Yingtai Xie <xieyingtai(a)huawei.com&gt; virDomainGetBlockIoTune() will be called before setBlockIoTune, as a result, it leads to a failure if set flags with VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG which is an reasonable option. Signed-off-by: Yingtai Xie <xieyingtai(a)huawei.com&gt; --- libvirt-override.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libvirt-override.c b/libvirt-override.c index 2de95ce..caa52fb 100644 --- a/libvirt-override.c +++ b/libvirt-override.c @@ -4805,6 +4805,7 @@ libvirt_virDomainSetBlockIoTune(PyObject *self ATTRIBUTE_UNUSED, Py_ssize_t size = 0; const char *disk; unsigned int flags; + unsigned int flags1 = VIR_DOMAIN_AFFECT_LIVE; virTypedParameterPtr params = NULL, new_params = NULL; if (!PyArg_ParseTuple(args, (char *)"OzOI:virDomainSetBlockIoTune", @@ -4822,7 +4823,7 @@ libvirt_virDomainSetBlockIoTune(PyObject *self ATTRIBUTE_UNUSED, } LIBVIRT_BEGIN_ALLOW_THREADS; - i_retval = virDomainGetBlockIoTune(domain, disk, NULL, &nparams, flags); + i_retval = virDomainGetBlockIoTune(domain, disk, NULL, &nparams, flags1); LIBVIRT_END_ALLOW_THREADS; if (i_retval < 0) @@ -4838,7 +4839,7 @@ libvirt_virDomainSetBlockIoTune(PyObject *self ATTRIBUTE_UNUSED, return PyErr_NoMemory(); LIBVIRT_BEGIN_ALLOW_THREADS; - i_retval = virDomainGetBlockIoTune(domain, disk, params, &nparams, flags); + i_retval = virDomainGetBlockIoTune(domain, disk, params, &nparams, flags1); LIBVIRT_END_ALLOW_THREADS; if (i_retval < 0) { -- 1.8.3.1