@@ -48,15 +48,19 @@ distance (memory latency) between all numa nodes.
Note:
1. Each entry represents distance from first node to second node.
- The distances are equal in either direction.
2. The distance from a node to self (local distance) is represented
with value 10 and all internode distance should be represented with
a value greater than 10.
- 3. distance-matrix should have entries in lexicographical ascending
+ 3. For non-local node pairs:
+ 1) If both direction specified, keep no change.
+ 2) If only one direction specified, assign it to the other direction.
+ 3) If none of the two direction specified, both are assigned to
+ REMOTE_DISTANCE.
+ 4. distance-matrix should have entries in lexicographical ascending
order of nodes.
- 4. There must be only one device node distance-map which must
+ 5. There must be only one device node distance-map which must
reside in the root node.
- 5. If the distance-map node is not present, a default
+ 6. If the distance-map node is not present, a default
distance-matrix is used.
Example:
At present, the distances must equal in both direction for each node pairs. For example: the distance of node B->A must the same to A->B. But we really don't have to do this. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> --- Documentation/devicetree/bindings/numa.txt | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) -- 2.5.0