On 6/8/22 12:29 PM, Ying Huang wrote:
On Fri, 2022-06-03 at 19:12 +0530, Aneesh Kumar K.V wrote:
This patch adds the special string "none" as a supported memtier value
that we can use to remove a specific node from being using as demotion target.
For ex:
:/sys/devices/system/node/node1# cat memtier
1
:/sys/devices/system/node/node1# cat ../../memtier/memtier1/nodelist
1-3
:/sys/devices/system/node/node1# echo none > memtier
:/sys/devices/system/node/node1#
:/sys/devices/system/node/node1# cat memtier
:/sys/devices/system/node/node1# cat ../../memtier/memtier1/nodelist
2-3
:/sys/devices/system/node/node1#
Do you have a practical use case for this? What kind of memory node
needs to be removed from memory tiers demotion/promotion?
This came up in our internal discussion. It was mentioned that there is
a need to skip some slow memory nodes from participating in demotion.
-aneesh
