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RE: [PATCH 08/21] xen/sched: Link CPU topology to scheduler and display via xl info
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Hirokazu Takahashi <taka@xxxxxxxxxxxxx>
- Date: Sun, 24 May 2026 20:37:15 +0000
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- Delivery-date: Sun, 24 May 2026 20:37:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHc6xClRaEaMKd2V0q5p1f04gDybbYdTMKAgABWeWA=
- Thread-topic: [PATCH 08/21] xen/sched: Link CPU topology to scheduler and display via xl info
Hello,
> > --- a/xen/include/xen/cpu_topology.h
> > +++ b/xen/include/xen/cpu_topology.h
> > @@ -14,6 +14,9 @@ struct cpu_topology {
> > cpumask_t thread_sibling;
> > cpumask_t core_sibling;
> > cpumask_t cluster_sibling;
> > + int to_core;
> > + int to_socket;
> > + int num_siblings;
> > };
>
> What significance do the to_ prefixes have here? And what's the meaning of any
> of the fields holding negative values? (If they can't hold negative values,
> use
> unsigned int please.)
These members are used to map a logical CPU ID to a physical core ID and
a physical socket ID. I will rename them to phys_core_id and phys_socket_id
respectively, and make them unsigned int.
Thank you for your advice.
Hirokazu Takahashi
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