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path: root/drivers/base/node.c
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Diffstat (limited to 'drivers/base/node.c')
-rw-r--r--drivers/base/node.c858
1 files changed, 420 insertions, 438 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 5b02f69769e8..00cf4532f121 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -7,6 +7,7 @@
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/memory.h>
+#include <linux/mempolicy.h>
#include <linux/vmstat.h>
#include <linux/notifier.h>
#include <linux/node.h>
@@ -20,45 +21,54 @@
#include <linux/pm_runtime.h>
#include <linux/swap.h>
#include <linux/slab.h>
+#include <linux/memblock.h>
-static struct bus_type node_subsys = {
+static const struct bus_type node_subsys = {
.name = "node",
.dev_name = "node",
};
-
-static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)
+static inline ssize_t cpumap_read(struct file *file, struct kobject *kobj,
+ const struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
{
- ssize_t n;
- cpumask_var_t mask;
+ struct device *dev = kobj_to_dev(kobj);
struct node *node_dev = to_node(dev);
-
- /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */
- BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));
+ cpumask_var_t mask;
+ ssize_t n;
if (!alloc_cpumask_var(&mask, GFP_KERNEL))
return 0;
cpumask_and(mask, cpumask_of_node(node_dev->dev.id), cpu_online_mask);
- n = cpumap_print_to_pagebuf(list, buf, mask);
+ n = cpumap_print_bitmask_to_buf(buf, mask, off, count);
free_cpumask_var(mask);
return n;
}
-static inline ssize_t node_read_cpumask(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return node_read_cpumap(dev, false, buf);
-}
-static inline ssize_t node_read_cpulist(struct device *dev,
- struct device_attribute *attr, char *buf)
+static const BIN_ATTR_RO(cpumap, CPUMAP_FILE_MAX_BYTES);
+
+static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj,
+ const struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
{
- return node_read_cpumap(dev, true, buf);
+ struct device *dev = kobj_to_dev(kobj);
+ struct node *node_dev = to_node(dev);
+ cpumask_var_t mask;
+ ssize_t n;
+
+ if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+ return 0;
+
+ cpumask_and(mask, cpumask_of_node(node_dev->dev.id), cpu_online_mask);
+ n = cpumap_print_list_to_buf(buf, mask, off, count);
+ free_cpumask_var(mask);
+
+ return n;
}
-static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
-static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
+static const BIN_ATTR_RO(cpulist, CPULIST_FILE_MAX_BYTES);
/**
* struct node_access_nodes - Access class device to hold user visible
@@ -66,14 +76,14 @@ static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
* @dev: Device for this memory access class
* @list_node: List element in the node's access list
* @access: The access class rank
- * @hmem_attrs: Heterogeneous memory performance attributes
+ * @coord: Heterogeneous memory performance coordinates
*/
struct node_access_nodes {
struct device dev;
struct list_head list_node;
- unsigned access;
+ unsigned int access;
#ifdef CONFIG_HMEM_REPORTING
- struct node_hmem_attrs hmem_attrs;
+ struct access_coordinate coord;
#endif
};
#define to_access_nodes(dev) container_of(dev, struct node_access_nodes, dev)
@@ -102,6 +112,27 @@ static const struct attribute_group *node_access_node_groups[] = {
NULL,
};
+#ifdef CONFIG_MEMORY_HOTPLUG
+static BLOCKING_NOTIFIER_HEAD(node_chain);
+
+int register_node_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&node_chain, nb);
+}
+EXPORT_SYMBOL(register_node_notifier);
+
+void unregister_node_notifier(struct notifier_block *nb)
+{
+ blocking_notifier_chain_unregister(&node_chain, nb);
+}
+EXPORT_SYMBOL(unregister_node_notifier);
+
+int node_notify(unsigned long val, void *v)
+{
+ return blocking_notifier_call_chain(&node_chain, val, v);
+}
+#endif
+
static void node_remove_accesses(struct node *node)
{
struct node_access_nodes *c, *cnext;
@@ -118,7 +149,7 @@ static void node_access_release(struct device *dev)
}
static struct node_access_nodes *node_init_node_access(struct node *node,
- unsigned access)
+ enum access_coordinate_class access)
{
struct node_access_nodes *access_node;
struct device *dev;
@@ -153,19 +184,20 @@ free:
}
#ifdef CONFIG_HMEM_REPORTING
-#define ACCESS_ATTR(name) \
-static ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return sprintf(buf, "%u\n", to_access_nodes(dev)->hmem_attrs.name); \
-} \
-static DEVICE_ATTR_RO(name);
+#define ACCESS_ATTR(property) \
+static ssize_t property##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return sysfs_emit(buf, "%u\n", \
+ to_access_nodes(dev)->coord.property); \
+} \
+static DEVICE_ATTR_RO(property)
-ACCESS_ATTR(read_bandwidth)
-ACCESS_ATTR(read_latency)
-ACCESS_ATTR(write_bandwidth)
-ACCESS_ATTR(write_latency)
+ACCESS_ATTR(read_bandwidth);
+ACCESS_ATTR(read_latency);
+ACCESS_ATTR(write_bandwidth);
+ACCESS_ATTR(write_latency);
static struct attribute *access_attrs[] = {
&dev_attr_read_bandwidth.attr,
@@ -178,11 +210,11 @@ static struct attribute *access_attrs[] = {
/**
* node_set_perf_attrs - Set the performance values for given access class
* @nid: Node identifier to be set
- * @hmem_attrs: Heterogeneous memory performance attributes
+ * @coord: Heterogeneous memory performance coordinates
* @access: The access class the for the given attributes
*/
-void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs,
- unsigned access)
+void node_set_perf_attrs(unsigned int nid, struct access_coordinate *coord,
+ enum access_coordinate_class access)
{
struct node_access_nodes *c;
struct node *node;
@@ -196,7 +228,7 @@ void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs,
if (!c)
return;
- c->hmem_attrs = *hmem_attrs;
+ c->coord = *coord;
for (i = 0; access_attrs[i] != NULL; i++) {
if (sysfs_add_file_to_group(&c->dev.kobj, access_attrs[i],
"initiators")) {
@@ -205,7 +237,54 @@ void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs,
break;
}
}
+
+ /* When setting CPU access coordinates, update mempolicy */
+ if (access == ACCESS_COORDINATE_CPU) {
+ if (mempolicy_set_node_perf(nid, coord)) {
+ pr_info("failed to set mempolicy attrs for node %d\n",
+ nid);
+ }
+ }
}
+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
@@ -225,20 +304,23 @@ static ssize_t name##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
- return sprintf(buf, fmt "\n", to_cache_info(dev)->cache_attrs.name);\
+ return sysfs_emit(buf, fmt "\n", \
+ to_cache_info(dev)->cache_attrs.name); \
} \
-DEVICE_ATTR_RO(name);
+static DEVICE_ATTR_RO(name);
CACHE_ATTR(size, "%llu")
CACHE_ATTR(line_size, "%u")
CACHE_ATTR(indexing, "%u")
CACHE_ATTR(write_policy, "%u")
+CACHE_ATTR(address_mode, "%#x")
static struct attribute *cache_attrs[] = {
&dev_attr_indexing.attr,
&dev_attr_size.attr,
&dev_attr_line_size.attr,
&dev_attr_write_policy.attr,
+ &dev_attr_address_mode.attr,
NULL,
};
ATTRIBUTE_GROUPS(cache);
@@ -262,21 +344,20 @@ static void node_init_cache_dev(struct node *node)
if (!dev)
return;
+ device_initialize(dev);
dev->parent = &node->dev;
dev->release = node_cache_release;
if (dev_set_name(dev, "memory_side_cache"))
- goto free_dev;
+ goto put_device;
- if (device_register(dev))
- goto free_name;
+ if (device_add(dev))
+ goto put_device;
pm_runtime_no_callbacks(dev);
node->cache_dev = dev;
return;
-free_name:
- kfree_const(dev->kobj.name);
-free_dev:
- kfree(dev);
+put_device:
+ put_device(dev);
}
/**
@@ -313,25 +394,24 @@ void node_add_cache(unsigned int nid, struct node_cache_attrs *cache_attrs)
return;
dev = &info->dev;
+ device_initialize(dev);
dev->parent = node->cache_dev;
dev->release = node_cacheinfo_release;
dev->groups = cache_groups;
if (dev_set_name(dev, "index%d", cache_attrs->level))
- goto free_cache;
+ goto put_device;
info->cache_attrs = *cache_attrs;
- if (device_register(dev)) {
+ if (device_add(dev)) {
dev_warn(&node->dev, "failed to add cache level:%d\n",
cache_attrs->level);
- goto free_name;
+ goto put_device;
}
pm_runtime_no_callbacks(dev);
list_add_tail(&info->node, &node->cache_attrs);
return;
-free_name:
- kfree_const(dev->kobj.name);
-free_cache:
- kfree(info);
+put_device:
+ put_device(dev);
}
static void node_remove_caches(struct node *node)
@@ -361,137 +441,148 @@ static void node_remove_caches(struct node *node) { }
static ssize_t node_read_meminfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int n;
+ int len = 0;
int nid = dev->id;
struct pglist_data *pgdat = NODE_DATA(nid);
struct sysinfo i;
unsigned long sreclaimable, sunreclaimable;
+ unsigned long swapcached = 0;
si_meminfo_node(&i, nid);
- sreclaimable = node_page_state(pgdat, NR_SLAB_RECLAIMABLE);
- sunreclaimable = node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE);
- n = sprintf(buf,
- "Node %d MemTotal: %8lu kB\n"
- "Node %d MemFree: %8lu kB\n"
- "Node %d MemUsed: %8lu kB\n"
- "Node %d Active: %8lu kB\n"
- "Node %d Inactive: %8lu kB\n"
- "Node %d Active(anon): %8lu kB\n"
- "Node %d Inactive(anon): %8lu kB\n"
- "Node %d Active(file): %8lu kB\n"
- "Node %d Inactive(file): %8lu kB\n"
- "Node %d Unevictable: %8lu kB\n"
- "Node %d Mlocked: %8lu kB\n",
- nid, K(i.totalram),
- nid, K(i.freeram),
- nid, K(i.totalram - i.freeram),
- nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) +
- node_page_state(pgdat, NR_ACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) +
- node_page_state(pgdat, NR_INACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)),
- nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)),
- nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)),
- nid, K(node_page_state(pgdat, NR_UNEVICTABLE)),
- nid, K(sum_zone_node_page_state(nid, NR_MLOCK)));
+ sreclaimable = node_page_state_pages(pgdat, NR_SLAB_RECLAIMABLE_B);
+ sunreclaimable = node_page_state_pages(pgdat, NR_SLAB_UNRECLAIMABLE_B);
+#ifdef CONFIG_SWAP
+ swapcached = node_page_state_pages(pgdat, NR_SWAPCACHE);
+#endif
+ len = sysfs_emit_at(buf, len,
+ "Node %d MemTotal: %8lu kB\n"
+ "Node %d MemFree: %8lu kB\n"
+ "Node %d MemUsed: %8lu kB\n"
+ "Node %d SwapCached: %8lu kB\n"
+ "Node %d Active: %8lu kB\n"
+ "Node %d Inactive: %8lu kB\n"
+ "Node %d Active(anon): %8lu kB\n"
+ "Node %d Inactive(anon): %8lu kB\n"
+ "Node %d Active(file): %8lu kB\n"
+ "Node %d Inactive(file): %8lu kB\n"
+ "Node %d Unevictable: %8lu kB\n"
+ "Node %d Mlocked: %8lu kB\n",
+ nid, K(i.totalram),
+ nid, K(i.freeram),
+ nid, K(i.totalram - i.freeram),
+ nid, K(swapcached),
+ nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) +
+ node_page_state(pgdat, NR_ACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) +
+ node_page_state(pgdat, NR_INACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)),
+ nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)),
+ nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)),
+ nid, K(node_page_state(pgdat, NR_UNEVICTABLE)),
+ nid, K(sum_zone_node_page_state(nid, NR_MLOCK)));
#ifdef CONFIG_HIGHMEM
- n += sprintf(buf + n,
- "Node %d HighTotal: %8lu kB\n"
- "Node %d HighFree: %8lu kB\n"
- "Node %d LowTotal: %8lu kB\n"
- "Node %d LowFree: %8lu kB\n",
- nid, K(i.totalhigh),
- nid, K(i.freehigh),
- nid, K(i.totalram - i.totalhigh),
- nid, K(i.freeram - i.freehigh));
+ len += sysfs_emit_at(buf, len,
+ "Node %d HighTotal: %8lu kB\n"
+ "Node %d HighFree: %8lu kB\n"
+ "Node %d LowTotal: %8lu kB\n"
+ "Node %d LowFree: %8lu kB\n",
+ nid, K(i.totalhigh),
+ nid, K(i.freehigh),
+ nid, K(i.totalram - i.totalhigh),
+ nid, K(i.freeram - i.freehigh));
#endif
- n += sprintf(buf + n,
- "Node %d Dirty: %8lu kB\n"
- "Node %d Writeback: %8lu kB\n"
- "Node %d FilePages: %8lu kB\n"
- "Node %d Mapped: %8lu kB\n"
- "Node %d AnonPages: %8lu kB\n"
- "Node %d Shmem: %8lu kB\n"
- "Node %d KernelStack: %8lu kB\n"
+ len += sysfs_emit_at(buf, len,
+ "Node %d Dirty: %8lu kB\n"
+ "Node %d Writeback: %8lu kB\n"
+ "Node %d FilePages: %8lu kB\n"
+ "Node %d Mapped: %8lu kB\n"
+ "Node %d AnonPages: %8lu kB\n"
+ "Node %d Shmem: %8lu kB\n"
+ "Node %d KernelStack: %8lu kB\n"
#ifdef CONFIG_SHADOW_CALL_STACK
- "Node %d ShadowCallStack:%8lu kB\n"
+ "Node %d ShadowCallStack:%8lu kB\n"
#endif
- "Node %d PageTables: %8lu kB\n"
- "Node %d NFS_Unstable: %8lu kB\n"
- "Node %d Bounce: %8lu kB\n"
- "Node %d WritebackTmp: %8lu kB\n"
- "Node %d KReclaimable: %8lu kB\n"
- "Node %d Slab: %8lu kB\n"
- "Node %d SReclaimable: %8lu kB\n"
- "Node %d SUnreclaim: %8lu kB\n"
+ "Node %d PageTables: %8lu kB\n"
+ "Node %d SecPageTables: %8lu kB\n"
+ "Node %d NFS_Unstable: %8lu kB\n"
+ "Node %d Bounce: %8lu kB\n"
+ "Node %d WritebackTmp: %8lu kB\n"
+ "Node %d KReclaimable: %8lu kB\n"
+ "Node %d Slab: %8lu kB\n"
+ "Node %d SReclaimable: %8lu kB\n"
+ "Node %d SUnreclaim: %8lu kB\n"
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- "Node %d AnonHugePages: %8lu kB\n"
- "Node %d ShmemHugePages: %8lu kB\n"
- "Node %d ShmemPmdMapped: %8lu kB\n"
- "Node %d FileHugePages: %8lu kB\n"
- "Node %d FilePmdMapped: %8lu kB\n"
+ "Node %d AnonHugePages: %8lu kB\n"
+ "Node %d ShmemHugePages: %8lu kB\n"
+ "Node %d ShmemPmdMapped: %8lu kB\n"
+ "Node %d FileHugePages: %8lu kB\n"
+ "Node %d FilePmdMapped: %8lu kB\n"
#endif
- ,
- nid, K(node_page_state(pgdat, NR_FILE_DIRTY)),
- nid, K(node_page_state(pgdat, NR_WRITEBACK)),
- nid, K(node_page_state(pgdat, NR_FILE_PAGES)),
- nid, K(node_page_state(pgdat, NR_FILE_MAPPED)),
- nid, K(node_page_state(pgdat, NR_ANON_MAPPED)),
- nid, K(i.sharedram),
- nid, sum_zone_node_page_state(nid, NR_KERNEL_STACK_KB),
+#ifdef CONFIG_UNACCEPTED_MEMORY
+ "Node %d Unaccepted: %8lu kB\n"
+#endif
+ ,
+ nid, K(node_page_state(pgdat, NR_FILE_DIRTY)),
+ nid, K(node_page_state(pgdat, NR_WRITEBACK)),
+ nid, K(node_page_state(pgdat, NR_FILE_PAGES)),
+ nid, K(node_page_state(pgdat, NR_FILE_MAPPED)),
+ nid, K(node_page_state(pgdat, NR_ANON_MAPPED)),
+ nid, K(i.sharedram),
+ nid, node_page_state(pgdat, NR_KERNEL_STACK_KB),
#ifdef CONFIG_SHADOW_CALL_STACK
- nid, sum_zone_node_page_state(nid, NR_KERNEL_SCS_KB),
+ nid, node_page_state(pgdat, NR_KERNEL_SCS_KB),
#endif
- nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)),
- nid, 0UL,
- nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
- nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
- nid, K(sreclaimable +
- node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)),
- nid, K(sreclaimable + sunreclaimable),
- nid, K(sreclaimable),
- nid, K(sunreclaimable)
+ nid, K(node_page_state(pgdat, NR_PAGETABLE)),
+ nid, K(node_page_state(pgdat, NR_SECONDARY_PAGETABLE)),
+ nid, 0UL,
+ nid, 0UL,
+ nid, 0UL,
+ nid, K(sreclaimable +
+ node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)),
+ nid, K(sreclaimable + sunreclaimable),
+ nid, K(sreclaimable),
+ nid, K(sunreclaimable)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- ,
- nid, K(node_page_state(pgdat, NR_ANON_THPS) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_SHMEM_THPS) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_FILE_THPS) *
- HPAGE_PMD_NR),
- nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) *
- HPAGE_PMD_NR)
+ ,
+ nid, K(node_page_state(pgdat, NR_ANON_THPS)),
+ nid, K(node_page_state(pgdat, NR_SHMEM_THPS)),
+ nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED)),
+ nid, K(node_page_state(pgdat, NR_FILE_THPS)),
+ nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED))
#endif
- );
- n += hugetlb_report_node_meminfo(nid, buf + n);
- return n;
+#ifdef CONFIG_UNACCEPTED_MEMORY
+ ,
+ nid, K(sum_zone_node_page_state(nid, NR_UNACCEPTED))
+#endif
+ );
+ len += hugetlb_report_node_meminfo(buf, len, nid);
+ return len;
}
#undef K
-static DEVICE_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
+static DEVICE_ATTR(meminfo, 0444, node_read_meminfo, NULL);
static ssize_t node_read_numastat(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf,
- "numa_hit %lu\n"
- "numa_miss %lu\n"
- "numa_foreign %lu\n"
- "interleave_hit %lu\n"
- "local_node %lu\n"
- "other_node %lu\n",
- sum_zone_numa_state(dev->id, NUMA_HIT),
- sum_zone_numa_state(dev->id, NUMA_MISS),
- sum_zone_numa_state(dev->id, NUMA_FOREIGN),
- sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT),
- sum_zone_numa_state(dev->id, NUMA_LOCAL),
- sum_zone_numa_state(dev->id, NUMA_OTHER));
-}
-static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
+ struct device_attribute *attr, char *buf)
+{
+ fold_vm_numa_events();
+ return sysfs_emit(buf,
+ "numa_hit %lu\n"
+ "numa_miss %lu\n"
+ "numa_foreign %lu\n"
+ "interleave_hit %lu\n"
+ "local_node %lu\n"
+ "other_node %lu\n",
+ sum_zone_numa_event_state(dev->id, NUMA_HIT),
+ sum_zone_numa_event_state(dev->id, NUMA_MISS),
+ sum_zone_numa_event_state(dev->id, NUMA_FOREIGN),
+ sum_zone_numa_event_state(dev->id, NUMA_INTERLEAVE_HIT),
+ sum_zone_numa_event_state(dev->id, NUMA_LOCAL),
+ sum_zone_numa_event_state(dev->id, NUMA_OTHER));
+}
+static DEVICE_ATTR(numastat, 0444, node_read_numastat, NULL);
static ssize_t node_read_vmstat(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -499,28 +590,36 @@ static ssize_t node_read_vmstat(struct device *dev,
int nid = dev->id;
struct pglist_data *pgdat = NODE_DATA(nid);
int i;
- int n = 0;
+ int len = 0;
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- n += sprintf(buf+n, "%s %lu\n", zone_stat_name(i),
- sum_zone_node_page_state(nid, i));
+ len += sysfs_emit_at(buf, len, "%s %lu\n",
+ zone_stat_name(i),
+ sum_zone_node_page_state(nid, i));
#ifdef CONFIG_NUMA
- for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++)
- n += sprintf(buf+n, "%s %lu\n", numa_stat_name(i),
- sum_zone_numa_state(nid, i));
+ fold_vm_numa_events();
+ for (i = 0; i < NR_VM_NUMA_EVENT_ITEMS; i++)
+ len += sysfs_emit_at(buf, len, "%s %lu\n",
+ numa_stat_name(i),
+ sum_zone_numa_event_state(nid, i));
+
#endif
+ for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
+ unsigned long pages = node_page_state_pages(pgdat, i);
- for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++)
- n += sprintf(buf+n, "%s %lu\n", node_stat_name(i),
- node_page_state(pgdat, i));
+ if (vmstat_item_print_in_thp(i))
+ pages /= HPAGE_PMD_NR;
+ len += sysfs_emit_at(buf, len, "%s %lu\n", node_stat_name(i),
+ pages);
+ }
- return n;
+ return len;
}
-static DEVICE_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL);
+static DEVICE_ATTR(vmstat, 0444, node_read_vmstat, NULL);
static ssize_t node_read_distance(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
int nid = dev->id;
int len = 0;
@@ -532,124 +631,49 @@ static ssize_t node_read_distance(struct device *dev,
*/
BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE);
- for_each_online_node(i)
- len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
+ for_each_online_node(i) {
+ len += sysfs_emit_at(buf, len, "%s%d",
+ i ? " " : "", node_distance(nid, i));
+ }
- len += sprintf(buf + len, "\n");
+ len += sysfs_emit_at(buf, len, "\n");
return len;
}
-static DEVICE_ATTR(distance, S_IRUGO, node_read_distance, NULL);
+static DEVICE_ATTR(distance, 0444, node_read_distance, NULL);
static struct attribute *node_dev_attrs[] = {
- &dev_attr_cpumap.attr,
- &dev_attr_cpulist.attr,
&dev_attr_meminfo.attr,
&dev_attr_numastat.attr,
&dev_attr_distance.attr,
&dev_attr_vmstat.attr,
NULL
};
-ATTRIBUTE_GROUPS(node_dev);
-
-#ifdef CONFIG_HUGETLBFS
-/*
- * hugetlbfs per node attributes registration interface:
- * When/if hugetlb[fs] subsystem initializes [sometime after this module],
- * it will register its per node attributes for all online nodes with
- * memory. It will also call register_hugetlbfs_with_node(), below, to
- * register its attribute registration functions with this node driver.
- * Once these hooks have been initialized, the node driver will call into
- * the hugetlb module to [un]register attributes for hot-plugged nodes.
- */
-static node_registration_func_t __hugetlb_register_node;
-static node_registration_func_t __hugetlb_unregister_node;
-
-static inline bool hugetlb_register_node(struct node *node)
-{
- if (__hugetlb_register_node &&
- node_state(node->dev.id, N_MEMORY)) {
- __hugetlb_register_node(node);
- return true;
- }
- return false;
-}
-static inline void hugetlb_unregister_node(struct node *node)
-{
- if (__hugetlb_unregister_node)
- __hugetlb_unregister_node(node);
-}
+static const struct bin_attribute *node_dev_bin_attrs[] = {
+ &bin_attr_cpumap,
+ &bin_attr_cpulist,
+ NULL
+};
-void register_hugetlbfs_with_node(node_registration_func_t doregister,
- node_registration_func_t unregister)
-{
- __hugetlb_register_node = doregister;
- __hugetlb_unregister_node = unregister;
-}
-#else
-static inline void hugetlb_register_node(struct node *node) {}
+static const struct attribute_group node_dev_group = {
+ .attrs = node_dev_attrs,
+ .bin_attrs = node_dev_bin_attrs,
+};
-static inline void hugetlb_unregister_node(struct node *node) {}
+static const struct attribute_group *node_dev_groups[] = {
+ &node_dev_group,
+#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
+ &arch_node_dev_group,
#endif
-
-static void node_device_release(struct device *dev)
-{
- struct node *node = to_node(dev);
-
-#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
- /*
- * We schedule the work only when a memory section is
- * onlined/offlined on this node. When we come here,
- * all the memory on this node has been offlined,
- * so we won't enqueue new work to this work.
- *
- * The work is using node->node_work, so we should
- * flush work before freeing the memory.
- */
- flush_work(&node->node_work);
+#ifdef CONFIG_MEMORY_FAILURE
+ &memory_failure_attr_group,
#endif
- kfree(node);
-}
-
-/*
- * register_node - Setup a sysfs device for a node.
- * @num - Node number to use when creating the device.
- *
- * Initialize and register the node device.
- */
-static int register_node(struct node *node, int num)
-{
- int error;
-
- node->dev.id = num;
- node->dev.bus = &node_subsys;
- node->dev.release = node_device_release;
- node->dev.groups = node_dev_groups;
- error = device_register(&node->dev);
-
- if (error)
- put_device(&node->dev);
- else {
- hugetlb_register_node(node);
-
- compaction_register_node(node);
- }
- return error;
-}
+ NULL
+};
-/**
- * unregister_node - unregister a node device
- * @node: node going away
- *
- * Unregisters a node device @node. All the devices on the node must be
- * unregistered before calling this function.
- */
-void unregister_node(struct node *node)
+static void node_device_release(struct device *dev)
{
- hugetlb_unregister_node(node); /* no-op, if memoryless node */
- node_remove_accesses(node);
- node_remove_caches(node);
- device_unregister(&node->dev);
+ kfree(to_node(dev));
}
struct node *node_devices[MAX_NUMNODES];
@@ -695,7 +719,7 @@ int register_cpu_under_node(unsigned int cpu, unsigned int nid)
*/
int register_memory_node_under_compute_node(unsigned int mem_nid,
unsigned int cpu_nid,
- unsigned access)
+ enum access_coordinate_class access)
{
struct node *init_node, *targ_node;
struct node_access_nodes *initiator, *target;
@@ -749,71 +773,40 @@ int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
return 0;
}
-#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
-static int __ref get_nid_for_pfn(unsigned long pfn)
-{
- if (!pfn_valid_within(pfn))
- return -1;
-#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
- if (system_state < SYSTEM_RUNNING)
- return early_pfn_to_nid(pfn);
-#endif
- return pfn_to_nid(pfn);
-}
-
-/* register memory section under specified node if it spans that node */
-static int register_mem_sect_under_node(struct memory_block *mem_blk,
- void *arg)
+#ifdef CONFIG_MEMORY_HOTPLUG
+static void do_register_memory_block_under_node(int nid,
+ struct memory_block *mem_blk)
{
- unsigned long memory_block_pfns = memory_block_size_bytes() / PAGE_SIZE;
- unsigned long start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
- unsigned long end_pfn = start_pfn + memory_block_pfns - 1;
- int ret, nid = *(int *)arg;
- unsigned long pfn;
-
- for (pfn = start_pfn; pfn <= end_pfn; pfn++) {
- int page_nid;
-
- /*
- * memory block could have several absent sections from start.
- * skip pfn range from absent section
- */
- if (!pfn_in_present_section(pfn)) {
- pfn = round_down(pfn + PAGES_PER_SECTION,
- PAGES_PER_SECTION) - 1;
- continue;
- }
-
- /*
- * We need to check if page belongs to nid only for the boot
- * case, during hotplug we know that all pages in the memory
- * block belong to the same node.
- */
- if (system_state == SYSTEM_BOOTING) {
- page_nid = get_nid_for_pfn(pfn);
- if (page_nid < 0)
- continue;
- if (page_nid != nid)
- continue;
- }
-
- /*
- * If this memory block spans multiple nodes, we only indicate
- * the last processed node.
- */
- mem_blk->nid = nid;
+ int ret;
- ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
- &mem_blk->dev.kobj,
- kobject_name(&mem_blk->dev.kobj));
- if (ret)
- return ret;
+ ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
+ &mem_blk->dev.kobj,
+ kobject_name(&mem_blk->dev.kobj));
+ if (ret && ret != -EEXIST)
+ dev_err_ratelimited(&node_devices[nid]->dev,
+ "can't create link to %s in sysfs (%d)\n",
+ kobject_name(&mem_blk->dev.kobj), ret);
- return sysfs_create_link_nowarn(&mem_blk->dev.kobj,
+ ret = sysfs_create_link_nowarn(&mem_blk->dev.kobj,
&node_devices[nid]->dev.kobj,
kobject_name(&node_devices[nid]->dev.kobj));
- }
- /* mem section does not span the specified node */
+ if (ret && ret != -EEXIST)
+ dev_err_ratelimited(&mem_blk->dev,
+ "can't create link to %s in sysfs (%d)\n",
+ kobject_name(&node_devices[nid]->dev.kobj),
+ ret);
+}
+
+/*
+ * During hotplug we know that all pages in the memory block belong to the same
+ * node.
+ */
+static int register_mem_block_under_node_hotplug(struct memory_block *mem_blk,
+ void *arg)
+{
+ int nid = *(int *)arg;
+
+ do_register_memory_block_under_node(nid, mem_blk);
return 0;
}
@@ -832,91 +825,77 @@ void unregister_memory_block_under_nodes(struct memory_block *mem_blk)
kobject_name(&node_devices[mem_blk->nid]->dev.kobj));
}
-int link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn)
+/* register all memory blocks under the corresponding nodes */
+static void register_memory_blocks_under_nodes(void)
{
- return walk_memory_blocks(PFN_PHYS(start_pfn),
- PFN_PHYS(end_pfn - start_pfn), (void *)&nid,
- register_mem_sect_under_node);
-}
+ struct memblock_region *r;
-#ifdef CONFIG_HUGETLBFS
-/*
- * Handle per node hstate attribute [un]registration on transistions
- * to/from memoryless state.
- */
-static void node_hugetlb_work(struct work_struct *work)
-{
- struct node *node = container_of(work, struct node, node_work);
+ for_each_mem_region(r) {
+ const unsigned long start_block_id = phys_to_block_id(r->base);
+ const unsigned long end_block_id = phys_to_block_id(r->base + r->size - 1);
+ const int nid = memblock_get_region_node(r);
+ unsigned long block_id;
- /*
- * We only get here when a node transitions to/from memoryless state.
- * We can detect which transition occurred by examining whether the
- * node has memory now. hugetlb_register_node() already check this
- * so we try to register the attributes. If that fails, then the
- * node has transitioned to memoryless, try to unregister the
- * attributes.
- */
- if (!hugetlb_register_node(node))
- hugetlb_unregister_node(node);
-}
+ if (!node_online(nid))
+ continue;
-static void init_node_hugetlb_work(int nid)
-{
- INIT_WORK(&node_devices[nid]->node_work, node_hugetlb_work);
-}
+ for (block_id = start_block_id; block_id <= end_block_id; block_id++) {
+ struct memory_block *mem;
-static int node_memory_callback(struct notifier_block *self,
- unsigned long action, void *arg)
-{
- struct memory_notify *mnb = arg;
- int nid = mnb->status_change_nid;
-
- switch (action) {
- case MEM_ONLINE:
- case MEM_OFFLINE:
- /*
- * offload per node hstate [un]registration to a work thread
- * when transitioning to/from memoryless state.
- */
- if (nid != NUMA_NO_NODE)
- schedule_work(&node_devices[nid]->node_work);
- break;
+ mem = find_memory_block_by_id(block_id);
+ if (!mem)
+ continue;
- case MEM_GOING_ONLINE:
- case MEM_GOING_OFFLINE:
- case MEM_CANCEL_ONLINE:
- case MEM_CANCEL_OFFLINE:
- default:
- break;
- }
+ memory_block_add_nid_early(mem, nid);
+ do_register_memory_block_under_node(nid, mem);
+ put_device(&mem->dev);
+ }
- return NOTIFY_OK;
+ }
}
-#endif /* CONFIG_HUGETLBFS */
-#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
-#if !defined(CONFIG_MEMORY_HOTPLUG_SPARSE) || \
- !defined(CONFIG_HUGETLBFS)
-static inline int node_memory_callback(struct notifier_block *self,
- unsigned long action, void *arg)
+void register_memory_blocks_under_node_hotplug(int nid, unsigned long start_pfn,
+ unsigned long end_pfn)
{
- return NOTIFY_OK;
+ walk_memory_blocks(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn),
+ (void *)&nid, register_mem_block_under_node_hotplug);
+ return;
}
+#endif /* CONFIG_MEMORY_HOTPLUG */
-static void init_node_hugetlb_work(int nid) { }
-
-#endif
-
-int __register_one_node(int nid)
+/**
+ * register_node - Initialize and register the node device.
+ * @nid: Node number to use when creating the device.
+ *
+ * Return: 0 on success, -errno otherwise
+ */
+int register_node(int nid)
{
int error;
int cpu;
+ struct node *node;
- node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL);
- if (!node_devices[nid])
+ node = kzalloc(sizeof(struct node), GFP_KERNEL);
+ if (!node)
return -ENOMEM;
- error = register_node(node_devices[nid], nid);
+ INIT_LIST_HEAD(&node->access_list);
+
+ node->dev.id = nid;
+ node->dev.bus = &node_subsys;
+ node->dev.release = node_device_release;
+ node->dev.groups = node_dev_groups;
+
+ error = device_register(&node->dev);
+ if (error) {
+ put_device(&node->dev);
+ return error;
+ }
+
+ node_devices[nid] = node;
+ hugetlb_register_node(node);
+ compaction_register_node(node);
+ reclaim_register_node(node);
/* link cpu under this node */
for_each_present_cpu(cpu) {
@@ -924,20 +903,30 @@ int __register_one_node(int nid)
register_cpu_under_node(cpu, nid);
}
- INIT_LIST_HEAD(&node_devices[nid]->access_list);
- /* initialize work queue for memory hot plug */
- init_node_hugetlb_work(nid);
node_init_caches(nid);
return error;
}
-
-void unregister_one_node(int nid)
+/**
+ * unregister_node - unregister a node device
+ * @nid: nid of the node going away
+ *
+ * Unregisters the node device at node id @nid. All the devices on the
+ * node must be unregistered before calling this function.
+ */
+void unregister_node(int nid)
{
- if (!node_devices[nid])
+ struct node *node = node_devices[nid];
+
+ if (!node)
return;
- unregister_node(node_devices[nid]);
+ hugetlb_unregister_node(node);
+ compaction_unregister_node(node);
+ reclaim_unregister_node(node);
+ node_remove_accesses(node);
+ node_remove_caches(node);
+ device_unregister(&node->dev);
node_devices[nid] = NULL;
}
@@ -945,17 +934,6 @@ void unregister_one_node(int nid)
* node states attributes
*/
-static ssize_t print_nodes_state(enum node_states state, char *buf)
-{
- int n;
-
- n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
- nodemask_pr_args(&node_states[state]));
- buf[n++] = '\n';
- buf[n] = '\0';
- return n;
-}
-
struct node_attr {
struct device_attribute attr;
enum node_states state;
@@ -965,7 +943,9 @@ static ssize_t show_node_state(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct node_attr *na = container_of(attr, struct node_attr, attr);
- return print_nodes_state(na->state, buf);
+
+ return sysfs_emit(buf, "%*pbl\n",
+ nodemask_pr_args(&node_states[na->state]));
}
#define _NODE_ATTR(name, state) \
@@ -980,6 +960,8 @@ static struct node_attr node_state_attr[] = {
#endif
[N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY),
[N_CPU] = _NODE_ATTR(has_cpu, N_CPU),
+ [N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator,
+ N_GENERIC_INITIATOR),
};
static struct attribute *node_state_attrs[] = {
@@ -991,10 +973,11 @@ static struct attribute *node_state_attrs[] = {
#endif
&node_state_attr[N_MEMORY].attr.attr,
&node_state_attr[N_CPU].attr.attr,
+ &node_state_attr[N_GENERIC_INITIATOR].attr.attr,
NULL
};
-static struct attribute_group memory_root_attr_group = {
+static const struct attribute_group memory_root_attr_group = {
.attrs = node_state_attrs,
};
@@ -1003,27 +986,26 @@ static const struct attribute_group *cpu_root_attr_groups[] = {
NULL,
};
-#define NODE_CALLBACK_PRI 2 /* lower than SLAB */
-static int __init register_node_type(void)
+void __init node_dev_init(void)
{
- int ret;
+ int ret, i;
BUILD_BUG_ON(ARRAY_SIZE(node_state_attr) != NR_NODE_STATES);
BUILD_BUG_ON(ARRAY_SIZE(node_state_attrs)-1 != NR_NODE_STATES);
ret = subsys_system_register(&node_subsys, cpu_root_attr_groups);
- if (!ret) {
- static struct notifier_block node_memory_callback_nb = {
- .notifier_call = node_memory_callback,
- .priority = NODE_CALLBACK_PRI,
- };
- register_hotmemory_notifier(&node_memory_callback_nb);
- }
+ if (ret)
+ panic("%s() failed to register subsystem: %d\n", __func__, ret);
/*
- * Note: we're not going to unregister the node class if we fail
- * to register the node state class attribute files.
+ * Create all node devices, which will properly link the node
+ * to already created cpu devices.
*/
- return ret;
+ for_each_online_node(i) {
+ ret = register_node(i);
+ if (ret)
+ panic("%s() failed to add node: %d\n", __func__, ret);
+ }
+
+ register_memory_blocks_under_nodes();
}
-postcore_initcall(register_node_type);
generated by cgit (git 2.34.1) at 2025-12-25 04:47:24 +0000