[libvirt] [PATCH] conf: fix running vm numa settings disappear after restart libvirtd

Peter Krempa pkrempa at redhat.com
Tue Mar 24 13:03:03 UTC 2015


On Mon, Mar 23, 2015 at 20:11:19 +0800, Luyao Huang wrote:
> 
> On 03/23/2015 06:10 PM, Peter Krempa wrote:
> > On Thu, Mar 19, 2015 at 18:13:04 +0800, Luyao Huang wrote:
> >> 5bba61f introduce a issue : when start a vm with <numa> settings and
> >> restart libvirtd, numa settings will disappear. Because when parse the
> >> vm states file, there is no node in "/domain/cpu/numa" this place.
> >>
> >> Change to use ./cpu/numa instead of /domain/cpu/numa.
> >>
> >> Signed-off-by: Luyao Huang <lhuang at redhat.com>
> >> ---
> >>   src/conf/numa_conf.c | 4 ++--
> >>   1 file changed, 2 insertions(+), 2 deletions(-)
> > Indeed the status XML wraps the  <domain> element with another container
> > element.
> 
> Yes, i just didn't know how to describe it in a right way when i wrote 
> this :)
> 
> >> diff --git a/src/conf/numa_conf.c b/src/conf/numa_conf.c
> >> index b92cb44..c34ba5f 100644
> >> --- a/src/conf/numa_conf.c
> >> +++ b/src/conf/numa_conf.c
> >> @@ -663,10 +663,10 @@ virDomainNumaDefCPUParseXML(virDomainNumaPtr def,
> >>       int ret = -1;
> >>   
> >>       /* check if NUMA definition is present */
> >> -    if (!virXPathNode("/domain/cpu/numa[1]", ctxt))
> >> +    if (!virXPathNode("./cpu/numa[1]", ctxt))
> >>           return 0;
> >>   
> >> -    if ((n = virXPathNodeSet("/domain/cpu/numa[1]/cell", ctxt, &nodes)) <= 0) {
> >> +    if ((n = virXPathNodeSet("./cpu/numa[1]/cell", ctxt, &nodes)) <= 0) {
> >>           virReportError(VIR_ERR_XML_ERROR, "%s",
> >>                          _("NUMA topology defined without NUMA cells"));
> >>           goto cleanup;
> >> -- 
> > ACK, I'll push your patch after I figure out how to add tests for
> > problems like this.

I've pushed this patch as I've written tests that don't work without it.
I'll submit the tests later today.

Peter
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