diff options
Diffstat (limited to 'drivers/base/node.c')
| -rw-r--r-- | drivers/base/node.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c index 3399594136b2..3e2329ccb618 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -249,6 +249,44 @@ void node_set_perf_attrs(unsigned int nid, struct access_coordinate *coord, EXPORT_SYMBOL_GPL(node_set_perf_attrs); /** + * node_update_perf_attrs - Update the performance values for given access class + * @nid: Node identifier to be updated + * @coord: Heterogeneous memory performance coordinates + * @access: The access class for the given attributes + */ +void node_update_perf_attrs(unsigned int nid, struct access_coordinate *coord, + enum access_coordinate_class access) +{ + struct node_access_nodes *access_node; + struct node *node; + int i; + + if (WARN_ON_ONCE(!node_online(nid))) + return; + + node = node_devices[nid]; + list_for_each_entry(access_node, &node->access_list, list_node) { + if (access_node->access != access) + continue; + + access_node->coord = *coord; + for (i = 0; access_attrs[i]; i++) { + sysfs_notify(&access_node->dev.kobj, + NULL, access_attrs[i]->name); + } + break; + } + + /* When setting CPU access coordinates, update mempolicy */ + if (access != ACCESS_COORDINATE_CPU) + return; + + if (mempolicy_set_node_perf(nid, coord)) + pr_info("failed to set mempolicy attrs for node %d\n", nid); +} +EXPORT_SYMBOL_GPL(node_update_perf_attrs); + +/** * struct node_cache_info - Internal tracking for memory node caches * @dev: Device represeting the cache level * @node: List element for tracking in the node @@ -885,6 +923,10 @@ int register_one_node(int nid) node_devices[nid] = node; error = register_node(node_devices[nid], nid); + if (error) { + node_devices[nid] = NULL; + return error; + } /* link cpu under this node */ for_each_present_cpu(cpu) { |