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Subject[PATCH v8 15/16] Documentation: remove the constraint on the distances of node pairs
Date
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(-)

diff --git a/Documentation/devicetree/bindings/numa.txt b/Documentation/devicetree/bindings/numa.txt
index 21b3505..f7234cd 100644
--- a/Documentation/devicetree/bindings/numa.txt
+++ b/Documentation/devicetree/bindings/numa.txt
@@ -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:
--
2.5.0

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