[libvirt] [PATCH 1/3] conf: Do not allow vcpupin's cpuid exceed current vcpus number

[Martin Kletzander]

On 10/10/2012 01:14 PM, Osier Yang wrote:
> Setting pinning policy for vcpu which exceed current vcpus number
> makes no sense, and it could cause problem for APIs which
> associate the vcpu thread id with cgroup.
> ---
>  src/conf/domain_conf.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
> index 33e1e7f..87e0c6b 100644
> --- a/src/conf/domain_conf.c
> +++ b/src/conf/domain_conf.c
> @@ -8746,9 +8746,9 @@ static virDomainDefPtr virDomainDefParseXML(virCapsPtr caps,
>      if (n && VIR_ALLOC_N(def->cputune.vcpupin, n) < 0)
>          goto no_memory;
>  
> -    if (n > def->maxvcpus) {
> +    if (n > def->vcpus) {
>          virReportError(VIR_ERR_INTERNAL_ERROR,
> -                       "%s", _("vcpupin nodes must be less than maxvcpus"));
> +                       "%s", _("vcpupin nodes must be less than current vcpus"));
>          goto error;
>      }
>  
> 

What about XML that specifies vcpu pinning for all the vcpus that might
be there, but now enables only one.  And other pinning just won't be
used until those vcpus are in plugged.  Or am I missing some problems
this could cause?

Martin