numa: convert static memory to dynamically allocated memory for per node device
We use a static array to store struct node. In many cases, we don't have too many nodes, and some memory will be unused. Convert it to per-device dynamically allocated memory. Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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parent
97d0da2204
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8732794b16
4 changed files with 27 additions and 21 deletions
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@ -607,7 +607,7 @@ static void register_nodes(void)
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int sysfs_add_device_to_node(struct device *dev, int nid)
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{
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struct node *node = &node_devices[nid];
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struct node *node = node_devices[nid];
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return sysfs_create_link(&node->dev.kobj, &dev->kobj,
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kobject_name(&dev->kobj));
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}
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@ -615,7 +615,7 @@ EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
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void sysfs_remove_device_from_node(struct device *dev, int nid)
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{
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struct node *node = &node_devices[nid];
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struct node *node = node_devices[nid];
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sysfs_remove_link(&node->dev.kobj, kobject_name(&dev->kobj));
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}
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EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
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@ -306,7 +306,7 @@ void unregister_node(struct node *node)
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device_unregister(&node->dev);
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}
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struct node node_devices[MAX_NUMNODES];
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struct node *node_devices[MAX_NUMNODES];
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/*
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* register cpu under node
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@ -323,15 +323,15 @@ int register_cpu_under_node(unsigned int cpu, unsigned int nid)
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if (!obj)
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return 0;
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ret = sysfs_create_link(&node_devices[nid].dev.kobj,
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ret = sysfs_create_link(&node_devices[nid]->dev.kobj,
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&obj->kobj,
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kobject_name(&obj->kobj));
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if (ret)
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return ret;
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return sysfs_create_link(&obj->kobj,
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&node_devices[nid].dev.kobj,
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kobject_name(&node_devices[nid].dev.kobj));
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&node_devices[nid]->dev.kobj,
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kobject_name(&node_devices[nid]->dev.kobj));
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}
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int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
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@ -345,10 +345,10 @@ int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
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if (!obj)
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return 0;
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sysfs_remove_link(&node_devices[nid].dev.kobj,
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sysfs_remove_link(&node_devices[nid]->dev.kobj,
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kobject_name(&obj->kobj));
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sysfs_remove_link(&obj->kobj,
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kobject_name(&node_devices[nid].dev.kobj));
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kobject_name(&node_devices[nid]->dev.kobj));
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return 0;
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}
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@ -390,15 +390,15 @@ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid)
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continue;
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if (page_nid != nid)
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continue;
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ret = sysfs_create_link_nowarn(&node_devices[nid].dev.kobj,
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ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
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&mem_blk->dev.kobj,
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kobject_name(&mem_blk->dev.kobj));
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if (ret)
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return ret;
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return sysfs_create_link_nowarn(&mem_blk->dev.kobj,
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&node_devices[nid].dev.kobj,
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kobject_name(&node_devices[nid].dev.kobj));
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&node_devices[nid]->dev.kobj,
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kobject_name(&node_devices[nid]->dev.kobj));
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}
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/* mem section does not span the specified node */
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return 0;
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@ -431,10 +431,10 @@ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
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continue;
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if (node_test_and_set(nid, *unlinked_nodes))
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continue;
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sysfs_remove_link(&node_devices[nid].dev.kobj,
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sysfs_remove_link(&node_devices[nid]->dev.kobj,
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kobject_name(&mem_blk->dev.kobj));
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sysfs_remove_link(&mem_blk->dev.kobj,
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kobject_name(&node_devices[nid].dev.kobj));
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kobject_name(&node_devices[nid]->dev.kobj));
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}
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NODEMASK_FREE(unlinked_nodes);
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return 0;
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@ -500,7 +500,7 @@ static void node_hugetlb_work(struct work_struct *work)
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static void init_node_hugetlb_work(int nid)
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{
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INIT_WORK(&node_devices[nid].node_work, node_hugetlb_work);
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INIT_WORK(&node_devices[nid]->node_work, node_hugetlb_work);
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}
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static int node_memory_callback(struct notifier_block *self,
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@ -517,7 +517,7 @@ static int node_memory_callback(struct notifier_block *self,
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* when transitioning to/from memoryless state.
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*/
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if (nid != NUMA_NO_NODE)
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schedule_work(&node_devices[nid].node_work);
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schedule_work(&node_devices[nid]->node_work);
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break;
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case MEM_GOING_ONLINE:
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@ -558,9 +558,13 @@ int register_one_node(int nid)
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struct node *parent = NULL;
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if (p_node != nid)
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parent = &node_devices[p_node];
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parent = node_devices[p_node];
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error = register_node(&node_devices[nid], nid, parent);
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node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL);
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if (!node_devices[nid])
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return -ENOMEM;
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error = register_node(node_devices[nid], nid, parent);
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/* link cpu under this node */
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for_each_present_cpu(cpu) {
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@ -581,7 +585,9 @@ int register_one_node(int nid)
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void unregister_one_node(int nid)
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{
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unregister_node(&node_devices[nid]);
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unregister_node(node_devices[nid]);
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kfree(node_devices[nid]);
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node_devices[nid] = NULL;
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}
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/*
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@ -27,7 +27,7 @@ struct node {
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};
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struct memory_block;
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extern struct node node_devices[];
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extern struct node *node_devices[];
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typedef void (*node_registration_func_t)(struct node *);
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extern int register_node(struct node *, int, struct node *);
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@ -1800,7 +1800,7 @@ static void hugetlb_unregister_all_nodes(void)
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* remove hstate attributes from any nodes that have them.
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*/
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for (nid = 0; nid < nr_node_ids; nid++)
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hugetlb_unregister_node(&node_devices[nid]);
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hugetlb_unregister_node(node_devices[nid]);
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}
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/*
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@ -1845,7 +1845,7 @@ static void hugetlb_register_all_nodes(void)
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int nid;
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for_each_node_state(nid, N_HIGH_MEMORY) {
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struct node *node = &node_devices[nid];
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struct node *node = node_devices[nid];
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if (node->dev.id == nid)
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hugetlb_register_node(node);
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}
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