Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drivers/base/node: Add a helper function node_update_perf_attrs()
Add helper function node_update_perf_attrs() to allow update of node access
coordinates computed by an external agent such as CXL. The helper allows
updating of coordinates after the attribute being created by HMAT.
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20250829222907.1290912-3-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
+46
+38
drivers/base/node.c
+38
drivers/base/node.c
···
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EXPORT_SYMBOL_GPL(node_set_perf_attrs);
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/**
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* node_update_perf_attrs - Update the performance values for given access class
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* @nid: Node identifier to be updated
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* @coord: Heterogeneous memory performance coordinates
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* @access: The access class for the given attributes
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*/
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void node_update_perf_attrs(unsigned int nid, struct access_coordinate *coord,
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enum access_coordinate_class access)
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{
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struct node_access_nodes *access_node;
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struct node *node;
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int i;
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if (WARN_ON_ONCE(!node_online(nid)))
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return;
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node = node_devices[nid];
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list_for_each_entry(access_node, &node->access_list, list_node) {
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if (access_node->access != access)
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continue;
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access_node->coord = *coord;
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for (i = 0; access_attrs[i]; i++) {
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sysfs_notify(&access_node->dev.kobj,
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NULL, access_attrs[i]->name);
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}
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break;
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}
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/* When setting CPU access coordinates, update mempolicy */
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if (access != ACCESS_COORDINATE_CPU)
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return;
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if (mempolicy_set_node_perf(nid, coord))
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pr_info("failed to set mempolicy attrs for node %d\n", nid);
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}
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EXPORT_SYMBOL_GPL(node_update_perf_attrs);
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+
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/**
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* struct node_cache_info - Internal tracking for memory node caches
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* @dev: Device represeting the cache level
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* @node: List element for tracking in the node
+8
include/linux/node.h
+8
include/linux/node.h
···
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void node_add_cache(unsigned int nid, struct node_cache_attrs *cache_attrs);
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void node_set_perf_attrs(unsigned int nid, struct access_coordinate *coord,
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enum access_coordinate_class access);
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void node_update_perf_attrs(unsigned int nid, struct access_coordinate *coord,
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enum access_coordinate_class access);
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#else
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static inline void node_add_cache(unsigned int nid,
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struct node_cache_attrs *cache_attrs)
···
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static inline void node_set_perf_attrs(unsigned int nid,
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struct access_coordinate *coord,
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enum access_coordinate_class access)
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{
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}
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static inline void node_update_perf_attrs(unsigned int nid,
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struct access_coordinate *coord,
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enum access_coordinate_class access)
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{
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}
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#endif