Re: [libvirt] [PATCH 2/3] virnuma: Introduce virNumaGetDistances

The API gets a NUMA node and find distances to other nodes. The distances are returned in an array. If an item X within the array equals to value of zero, then there's no such node as X. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/libvirt_private.syms | 1 + src/util/virnuma.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++ src/util/virnuma.h | 3 +++ 3 files changed, 54 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index cb635cd..6168f76 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1652,6 +1652,7 @@ virNodeSuspendGetTargetMask; virDomainNumatuneMemModeTypeFromString; virDomainNumatuneMemModeTypeToString; virNumaGetAutoPlacementAdvice; +virNumaGetDistances; virNumaGetMaxNode; virNumaGetNodeMemory; virNumaIsAvailable; diff --git a/src/util/virnuma.c b/src/util/virnuma.c index 1e099eb..68b2698 100644 --- a/src/util/virnuma.c +++ b/src/util/virnuma.c @@ -217,6 +217,56 @@ virNumaGetMaxNode(void) /** + * virNumaGetDistances: + * @node: identifier of the requested NUMA node + * @distances: array of distances to sibling nodes + * @ndistances: size of @distances + * + * Get array of distances to sibling nodes from @node. If a + * distances[x] equals to zero, the node x is not enabled or + * doesn't exist. As a special case, if @node itself refers to + * disabled or nonexistent NUMA node, then @distances and + * @ndistances are set to NULL and zero respectively.