Current implementation to find the demotion targets works
based on node state N_MEMORY, however some systems may have
dram only memory numa node which are N_MEMORY but not the
right choices as demotion targets.
Add new state N_DEMOTION_TARGETS, node_states[N_DEMOTION_TARGETS]
then can be used to hold the list of nodes which can be used
as demotion targets.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Signed-off-by: Jagdish Gediya <jvgediya@xxxxxxxxxxxxx>
---
drivers/base/node.c | 4 ++++
include/linux/nodemask.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index ec8bb24a5a22..cd79815b0f7a 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -1038,6 +1038,9 @@ static struct node_attr node_state_attr[] = {
[N_CPU] = _NODE_ATTR(has_cpu, N_CPU),
[N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator,
N_GENERIC_INITIATOR),
+ [N_DEMOTION_TARGETS] = _NODE_ATTR(has_demotion_targets,
+ N_DEMOTION_TARGETS),
+
};
static struct attribute *node_state_attrs[] = {
@@ -1050,6 +1053,7 @@ static struct attribute *node_state_attrs[] = {
&node_state_attr[N_MEMORY].attr.attr,
&node_state_attr[N_CPU].attr.attr,
&node_state_attr[N_GENERIC_INITIATOR].attr.attr,
+ &node_state_attr[N_DEMOTION_TARGETS].attr.attr,
NULL
};
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 567c3ddba2c4..17844300fd57 100644
--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -400,6 +400,7 @@ enum node_states {
N_MEMORY, /* The node has memory(regular, high, movable) */
N_CPU, /* The node has one or more cpus */
N_GENERIC_INITIATOR, /* The node has one or more Generic Initiators */
+ N_DEMOTION_TARGETS, /* Nodes that should be considered as demotion targets */
NR_NODE_STATES
};
--
2.35.1
