Release 4.7 drivers/base/node.c
/*
* Basic Node interface support
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/memory.h>
#include <linux/vmstat.h>
#include <linux/notifier.h>
#include <linux/node.h>
#include <linux/hugetlb.h>
#include <linux/compaction.h>
#include <linux/cpumask.h>
#include <linux/topology.h>
#include <linux/nodemask.h>
#include <linux/cpu.h>
#include <linux/device.h>
#include <linux/swap.h>
#include <linux/slab.h>
static struct bus_type node_subsys = {
.name = "node",
.dev_name = "node",
};
static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)
{
struct node *node_dev = to_node(dev);
const struct cpumask *mask = cpumask_of_node(node_dev->dev.id);
/* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */
BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));
return cpumap_print_to_pagebuf(list, buf, mask);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andrew morton | andrew morton | 31 | 43.66% | 3 | 30.00% |
| rusty russell | rusty russell | 18 | 25.35% | 3 | 30.00% |
| mike travis | mike travis | 15 | 21.13% | 2 | 20.00% |
| sudeep holla | sudeep holla | 5 | 7.04% | 1 | 10.00% |
| kay sievers | kay sievers | 2 | 2.82% | 1 | 10.00% |
| Total | 71 | 100.00% | 10 | 100.00% |
static inline ssize_t node_read_cpumask(struct device *dev,
struct device_attribute *attr, char *buf)
{
return node_read_cpumap(dev, false, buf);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| mike travis | mike travis | 24 | 77.42% | 1 | 25.00% |
| andi kleen | andi kleen | 4 | 12.90% | 1 | 25.00% |
| kay sievers | kay sievers | 2 | 6.45% | 1 | 25.00% |
| sudeep holla | sudeep holla | 1 | 3.23% | 1 | 25.00% |
| Total | 31 | 100.00% | 4 | 100.00% |
static inline ssize_t node_read_cpulist(struct device *dev,
struct device_attribute *attr, char *buf)
{
return node_read_cpumap(dev, true, buf);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| mike travis | mike travis | 24 | 77.42% | 1 | 25.00% |
| andi kleen | andi kleen | 4 | 12.90% | 1 | 25.00% |
| kay sievers | kay sievers | 2 | 6.45% | 1 | 25.00% |
| sudeep holla | sudeep holla | 1 | 3.23% | 1 | 25.00% |
| Total | 31 | 100.00% | 4 | 100.00% |
static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
#define K(x) ((x) << (PAGE_SHIFT - 10))
static ssize_t node_read_meminfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n;
int nid = dev->id;
struct sysinfo i;
si_meminfo_node(&i, nid);
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(nid, NR_ACTIVE_ANON) +
node_page_state(nid, NR_ACTIVE_FILE)),
nid, K(node_page_state(nid, NR_INACTIVE_ANON) +
node_page_state(nid, NR_INACTIVE_FILE)),
nid, K(node_page_state(nid, NR_ACTIVE_ANON)),
nid, K(node_page_state(nid, NR_INACTIVE_ANON)),
nid, K(node_page_state(nid, NR_ACTIVE_FILE)),
nid, K(node_page_state(nid, NR_INACTIVE_FILE)),
nid, K(node_page_state(nid, NR_UNEVICTABLE)),
nid, K(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));
#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"
"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 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"
#endif
,
nid, K(node_page_state(nid, NR_FILE_DIRTY)),
nid, K(node_page_state(nid, NR_WRITEBACK)),
nid, K(node_page_state(nid, NR_FILE_PAGES)),
nid, K(node_page_state(nid, NR_FILE_MAPPED)),
nid, K(node_page_state(nid, NR_ANON_PAGES)),
nid, K(i.sharedram),
nid, node_page_state(nid, NR_KERNEL_STACK) *
THREAD_SIZE / 1024,
nid, K(node_page_state(nid, NR_PAGETABLE)),
nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
nid, K(node_page_state(nid, NR_BOUNCE)),
nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)),
nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))
, nid,
K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
HPAGE_PMD_NR));
#else
nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andrew morton | andrew morton | 116 | 23.25% | 2 | 6.67% |
| christoph lameter | christoph lameter | 114 | 22.85% | 12 | 40.00% |
| rik van riel | rik van riel | 73 | 14.63% | 1 | 3.33% |
| kosaki motohiro | kosaki motohiro | 59 | 11.82% | 3 | 10.00% |
| claudio scordino | claudio scordino | 30 | 6.01% | 1 | 3.33% |
| martin hicks | martin hicks | 21 | 4.21% | 1 | 3.33% |
| david rientjes | david rientjes | 20 | 4.01% | 1 | 3.33% |
| lee schermerhorn | lee schermerhorn | 14 | 2.81% | 1 | 3.33% |
| nick piggin | nick piggin | 13 | 2.61% | 1 | 3.33% |
| miklos szeredi | miklos szeredi | 12 | 2.40% | 1 | 3.33% |
| akinobu mita | akinobu mita | 11 | 2.20% | 1 | 3.33% |
| john blackwood | john blackwood | 6 | 1.20% | 1 | 3.33% |
| andi kleen | andi kleen | 4 | 0.80% | 1 | 3.33% |
| rafael aquini | rafael aquini | 3 | 0.60% | 1 | 3.33% |
| kay sievers | kay sievers | 2 | 0.40% | 1 | 3.33% |
| patrick mochel | patrick mochel | 1 | 0.20% | 1 | 3.33% |
| Total | 499 | 100.00% | 30 | 100.00% |
#endif
n += hugetlb_report_node_meminfo(nid, buf + n);
return n;
}
#undef K
static DEVICE_ATTR(meminfo, S_IRUGO, 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",
node_page_state(dev->id, NUMA_HIT),
node_page_state(dev->id, NUMA_MISS),
node_page_state(dev->id, NUMA_FOREIGN),
node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
node_page_state(dev->id, NUMA_LOCAL),
node_page_state(dev->id, NUMA_OTHER));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| christoph lameter | christoph lameter | 48 | 55.17% | 1 | 25.00% |
| andrew morton | andrew morton | 33 | 37.93% | 1 | 25.00% |
| andi kleen | andi kleen | 4 | 4.60% | 1 | 25.00% |
| kay sievers | kay sievers | 2 | 2.30% | 1 | 25.00% |
| Total | 87 | 100.00% | 4 | 100.00% |
static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
static ssize_t node_read_vmstat(struct device *dev,
struct device_attribute *attr, char *buf)
{
int nid = dev->id;
int i;
int n = 0;
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
n += sprintf(buf+n, "%s %lu\n", vmstat_text[i],
node_page_state(nid, i));
return n;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| michael rubin | michael rubin | 38 | 51.35% | 1 | 33.33% |
| kosaki motohiro | kosaki motohiro | 34 | 45.95% | 1 | 33.33% |
| kay sievers | kay sievers | 2 | 2.70% | 1 | 33.33% |
| Total | 74 | 100.00% | 3 | 100.00% |
static DEVICE_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL);
static ssize_t node_read_distance(struct device *dev,
struct device_attribute *attr, char *buf)
{
int nid = dev->id;
int len = 0;
int i;
/*
* buf is currently PAGE_SIZE in length and each node needs 4 chars
* at the most (distance + space or newline).
*/
BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE);
for_each_online_node(i)
len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
len += sprintf(buf + len, "\n");
return len;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andi kleen | andi kleen | 80 | 91.95% | 3 | 50.00% |
| matthew dobson | matthew dobson | 4 | 4.60% | 1 | 16.67% |
| kay sievers | kay sievers | 2 | 2.30% | 1 | 16.67% |
| david rientjes | david rientjes | 1 | 1.15% | 1 | 16.67% |
| Total | 87 | 100.00% | 6 | 100.00% |
static DEVICE_ATTR(distance, S_IRUGO, 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 38 | 95.00% | 3 | 60.00% |
| lai jiangshan | lai jiangshan | 1 | 2.50% | 1 | 20.00% |
| kay sievers | kay sievers | 1 | 2.50% | 1 | 20.00% |
| Total | 40 | 100.00% | 5 | 100.00% |
static inline void hugetlb_unregister_node(struct node *node)
{
if (__hugetlb_unregister_node)
__hugetlb_unregister_node(node);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
void register_hugetlbfs_with_node(node_registration_func_t doregister,
node_registration_func_t unregister)
{
__hugetlb_register_node = doregister;
__hugetlb_unregister_node = unregister;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
#else
static inline void hugetlb_register_node(struct node *node) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void hugetlb_unregister_node(struct node *node) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
#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);
#endif
kfree(node);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yasuaki ishimatsu | yasuaki ishimatsu | 48 | 100.00% | 1 | 100.00% |
| Total | 48 | 100.00% | 1 | 100.00% |
/*
* 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, struct node *parent)
{
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){
hugetlb_register_node(node);
compaction_register_node(node);
}
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andrew morton | andrew morton | 52 | 61.18% | 2 | 22.22% |
| yasuaki ishimatsu | yasuaki ishimatsu | 9 | 10.59% | 2 | 22.22% |
| takashi iwai | takashi iwai | 7 | 8.24% | 1 | 11.11% |
| kay sievers | kay sievers | 6 | 7.06% | 1 | 11.11% |
| lee schermerhorn | lee schermerhorn | 5 | 5.88% | 1 | 11.11% |
| mel gorman | mel gorman | 5 | 5.88% | 1 | 11.11% |
| greg kroah-hartman | greg kroah-hartman | 1 | 1.18% | 1 | 11.11% |
| Total | 85 | 100.00% | 9 | 100.00% |
/**
* 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)
{
hugetlb_unregister_node(node); /* no-op, if memoryless node */
device_unregister(&node->dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| keiichiroe tokunaga | keiichiroe tokunaga | 16 | 66.67% | 1 | 25.00% |
| lee schermerhorn | lee schermerhorn | 6 | 25.00% | 2 | 50.00% |
| kay sievers | kay sievers | 2 | 8.33% | 1 | 25.00% |
| Total | 24 | 100.00% | 4 | 100.00% |
struct node *node_devices[MAX_NUMNODES];
/*
* register cpu under node
*/
int register_cpu_under_node(unsigned int cpu, unsigned int nid)
{
int ret;
struct device *obj;
if (!node_online(nid))
return 0;
obj = get_cpu_device(cpu);
if (!obj)
return 0;
ret = sysfs_create_link(&node_devices[nid]->dev.kobj,
&obj->kobj,
kobject_name(&obj->kobj));
if (ret)
return ret;
return sysfs_create_link(&obj->kobj,
&node_devices[nid]->dev.kobj,
kobject_name(&node_devices[nid]->dev.kobj));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kamezawa hiroyuki | kamezawa hiroyuki | 56 | 49.12% | 1 | 16.67% |
| alex chiang | alex chiang | 50 | 43.86% | 2 | 33.33% |
| kay sievers | kay sievers | 5 | 4.39% | 2 | 33.33% |
| wen congyang | wen congyang | 3 | 2.63% | 1 | 16.67% |
| Total | 114 | 100.00% | 6 | 100.00% |
int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
{
struct device *obj;
if (!node_online(nid))
return 0;
obj = get_cpu_device(cpu);
if (!obj)
return 0;
sysfs_remove_link(&node_devices[nid]->dev.kobj,
kobject_name(&obj->kobj));
sysfs_remove_link(&obj->kobj,
kobject_name(&node_devices[nid]->dev.kobj));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kamezawa hiroyuki | kamezawa hiroyuki | 50 | 56.18% | 1 | 16.67% |
| alex chiang | alex chiang | 33 | 37.08% | 2 | 33.33% |
| kay sievers | kay sievers | 4 | 4.49% | 2 | 33.33% |
| wen congyang | wen congyang | 2 | 2.25% | 1 | 16.67% |
| Total | 89 | 100.00% | 6 | 100.00% |
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
#define page_initialized(page) (page->lru.next)
static int __init_refok get_nid_for_pfn(unsigned long pfn)
{
struct page *page;
if (!pfn_valid_within(pfn))
return -1;
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
if (system_state == SYSTEM_BOOTING)
return early_pfn_to_nid(pfn);
#endif
page = pfn_to_page(pfn);
if (!page_initialized(page))
return -1;
return pfn_to_nid(pfn);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| gary hade | gary hade | 52 | 74.29% | 1 | 50.00% |
| mel gorman | mel gorman | 18 | 25.71% | 1 | 50.00% |
| Total | 70 | 100.00% | 2 | 100.00% |
/* register memory section under specified node if it spans that node */
int register_mem_sect_under_node(struct memory_block *mem_blk, int nid)
{
int ret;
unsigned long pfn, sect_start_pfn, sect_end_pfn;
if (!mem_blk)
return -EFAULT;
if (!node_online(nid))
return 0;
sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr);
sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr);
sect_end_pfn += PAGES_PER_SECTION - 1;
for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
int page_nid;
/*
* memory block could have several absent sections from start.
* skip pfn range from absent section
*/
if (!pfn_present(pfn)) {
pfn = round_down(pfn + PAGES_PER_SECTION,
PAGES_PER_SECTION) - 1;
continue;
}
page_nid = get_nid_for_pfn(pfn);
if (page_nid < 0)
continue;
if (page_nid != nid)
continue;
ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj,
&mem_blk->dev.kobj,
kobject_name(&mem_blk->dev.kobj));
if (ret)
return ret;
return 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 */
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| gary hade | gary hade | 124 | 59.33% | 1 | 16.67% |
| alex chiang | alex chiang | 41 | 19.62% | 1 | 16.67% |
| yinghai lu | yinghai lu | 25 | 11.96% | 1 | 16.67% |
| nathan fontenot | nathan fontenot | 10 | 4.78% | 1 | 16.67% |
| kay sievers | kay sievers | 6 | 2.87% | 1 | 16.67% |
| wen congyang | wen congyang | 3 | 1.44% | 1 | 16.67% |
| Total | 209 | 100.00% | 6 | 100.00% |
/* unregister memory section under all nodes that it spans */
int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
unsigned long phys_index)
{
NODEMASK_ALLOC(nodemask_t, unlinked_nodes, GFP_KERNEL);
unsigned long pfn, sect_start_pfn, sect_end_pfn;
if (!mem_blk) {
NODEMASK_FREE(unlinked_nodes);
return -EFAULT;
}
if (!unlinked_nodes)
return -ENOMEM;
nodes_clear(*unlinked_nodes);
sect_start_pfn = section_nr_to_pfn(phys_index);
sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1;
for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
int nid;
nid = get_nid_for_pfn(pfn);
if (nid < 0)
continue;
if (!node_online(nid))
continue;
if (node_test_and_set(nid, *unlinked_nodes))
continue;
sysfs_remove_link(&node_devices[nid]->dev.kobj,
kobject_name(&mem_blk->dev.kobj));
sysfs_remove_link(&mem_blk->dev.kobj,
kobject_name(&node_devices[nid]->dev.kobj));
}
NODEMASK_FREE(unlinked_nodes);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| gary hade | gary hade | 123 | 67.21% | 1 | 16.67% |
| david rientjes | david rientjes | 30 | 16.39% | 1 | 16.67% |
| alex chiang | alex chiang | 20 | 10.93% | 1 | 16.67% |
| nathan fontenot | nathan fontenot | 4 | 2.19% | 1 | 16.67% |
| kay sievers | kay sievers | 4 | 2.19% | 1 | 16.67% |
| wen congyang | wen congyang | 2 | 1.09% | 1 | 16.67% |
| Total | 183 | 100.00% | 6 | 100.00% |
static int link_mem_sections(int nid)
{
unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn;
unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages;
unsigned long pfn;
struct memory_block *mem_blk = NULL;
int err = 0;
for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
unsigned long section_nr = pfn_to_section_nr(pfn);
struct mem_section *mem_sect;
int ret;
if (!present_section_nr(section_nr))
continue;
mem_sect = __nr_to_section(section_nr);
/* same memblock ? */
if (mem_blk)
if ((section_nr >= mem_blk->start_section_nr) &&
(section_nr <= mem_blk->end_section_nr))
continue;
mem_blk = find_memory_block_hinted(mem_sect, mem_blk);
ret = register_mem_sect_under_node(mem_blk, nid);
if (!err)
err = ret;
/* discard ref obtained in find_memory_block() */
}
if (mem_blk)
kobject_put(&mem_blk->dev.kobj);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| gary hade | gary hade | 127 | 76.05% | 1 | 25.00% |
| yinghai lu | yinghai lu | 24 | 14.37% | 1 | 25.00% |
| robin holt | robin holt | 15 | 8.98% | 1 | 25.00% |
| kay sievers | kay sievers | 1 | 0.60% | 1 | 25.00% |
| Total | 167 | 100.00% | 4 | 100.00% |
#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);
/*
* 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 40 | 100.00% | 1 | 100.00% |
| Total | 40 | 100.00% | 1 | 100.00% |
static void init_node_hugetlb_work(int nid)
{
INIT_WORK(&node_devices[nid]->node_work, node_hugetlb_work);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 21 | 95.45% | 1 | 50.00% |
| wen congyang | wen congyang | 1 | 4.55% | 1 | 50.00% |
| Total | 22 | 100.00% | 2 | 100.00% |
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;
case MEM_GOING_ONLINE:
case MEM_GOING_OFFLINE:
case MEM_CANCEL_ONLINE:
case MEM_CANCEL_OFFLINE:
default:
break;
}
return NOTIFY_OK;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 80 | 98.77% | 2 | 66.67% |
| wen congyang | wen congyang | 1 | 1.23% | 1 | 33.33% |
| Total | 81 | 100.00% | 3 | 100.00% |
#endif /* CONFIG_HUGETLBFS */
#else /* !CONFIG_MEMORY_HOTPLUG_SPARSE */
static int link_mem_sections(int nid) { return 0; }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| gary hade | gary hade | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
#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)
{
return NOTIFY_OK;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
static void init_node_hugetlb_work(int nid) { }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 8 | 100.00% | 1 | 100.00% |
| Total | 8 | 100.00% | 1 | 100.00% |
#endif
int register_one_node(int nid)
{
int error = 0;
int cpu;
if (node_online(nid)) {
int p_node = parent_node(nid);
struct node *parent = NULL;
if (p_node != nid)
parent = node_devices[p_node];
node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL);
if (!node_devices[nid])
return -ENOMEM;
error = register_node(node_devices[nid], nid, parent);
/* link cpu under this node */
for_each_present_cpu(cpu) {
if (cpu_to_node(cpu) == nid)
register_cpu_under_node(cpu, nid);
}
/* link memory sections under this node */
error = link_mem_sections(nid);
/* initialize work queue for memory hot plug */
init_node_hugetlb_work(nid);
}
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yasunori goto | yasunori goto | 67 | 49.63% | 1 | 20.00% |
| wen congyang | wen congyang | 28 | 20.74% | 1 | 20.00% |
| kamezawa hiroyuki | kamezawa hiroyuki | 26 | 19.26% | 1 | 20.00% |
| gary hade | gary hade | 8 | 5.93% | 1 | 20.00% |
| lee schermerhorn | lee schermerhorn | 6 | 4.44% | 1 | 20.00% |
| Total | 135 | 100.00% | 5 | 100.00% |
void unregister_one_node(int nid)
{
if (!node_devices[nid])
return;
unregister_node(node_devices[nid]);
node_devices[nid] = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yasunori goto | yasunori goto | 16 | 50.00% | 1 | 33.33% |
| xishi qiu | xishi qiu | 9 | 28.12% | 1 | 33.33% |
| wen congyang | wen congyang | 7 | 21.88% | 1 | 33.33% |
| Total | 32 | 100.00% | 3 | 100.00% |
/*
* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 44 | 77.19% | 1 | 33.33% |
| tejun heo | tejun heo | 8 | 14.04% | 1 | 33.33% |
| ryota ozaki | ryota ozaki | 5 | 8.77% | 1 | 33.33% |
| Total | 57 | 100.00% | 3 | 100.00% |
struct node_attr {
struct device_attribute attr;
enum node_states state;
};
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andi kleen | andi kleen | 22 | 48.89% | 2 | 50.00% |
| lee schermerhorn | lee schermerhorn | 20 | 44.44% | 1 | 25.00% |
| kay sievers | kay sievers | 3 | 6.67% | 1 | 25.00% |
| Total | 45 | 100.00% | 4 | 100.00% |
#define _NODE_ATTR(name, state) \
{ __ATTR(name, 0444, show_node_state, NULL), state }
static struct node_attr node_state_attr[] = {
[N_POSSIBLE] = _NODE_ATTR(possible, N_POSSIBLE),
[N_ONLINE] = _NODE_ATTR(online, N_ONLINE),
[N_NORMAL_MEMORY] = _NODE_ATTR(has_normal_memory, N_NORMAL_MEMORY),
#ifdef CONFIG_HIGHMEM
[N_HIGH_MEMORY] = _NODE_ATTR(has_high_memory, N_HIGH_MEMORY),
#endif
#ifdef CONFIG_MOVABLE_NODE
[N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY),
#endif
[N_CPU] = _NODE_ATTR(has_cpu, N_CPU),
};
static struct attribute *node_state_attrs[] = {
&node_state_attr[N_POSSIBLE].attr.attr,
&node_state_attr[N_ONLINE].attr.attr,
&node_state_attr[N_NORMAL_MEMORY].attr.attr,
#ifdef CONFIG_HIGHMEM
&node_state_attr[N_HIGH_MEMORY].attr.attr,
#endif
#ifdef CONFIG_MOVABLE_NODE
&node_state_attr[N_MEMORY].attr.attr,
#endif
&node_state_attr[N_CPU].attr.attr,
NULL
};
static struct attribute_group memory_root_attr_group = {
.attrs = node_state_attrs,
};
static const struct attribute_group *cpu_root_attr_groups[] = {
&memory_root_attr_group,
NULL,
};
#define NODE_CALLBACK_PRI 2
/* lower than SLAB */
static int __init register_node_type(void)
{
int ret;
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);
}
/*
* Note: we're not going to unregister the node class if we fail
* to register the node state class attribute files.
*/
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andrew morton | andrew morton | 28 | 35.90% | 2 | 25.00% |
| andi kleen | andi kleen | 22 | 28.21% | 1 | 12.50% |
| lee schermerhorn | lee schermerhorn | 20 | 25.64% | 2 | 25.00% |
| kay sievers | kay sievers | 4 | 5.13% | 1 | 12.50% |
| patrick mochel | patrick mochel | 3 | 3.85% | 1 | 12.50% |
| keiichiroe tokunaga | keiichiroe tokunaga | 1 | 1.28% | 1 | 12.50% |
| Total | 78 | 100.00% | 8 | 100.00% |
postcore_initcall(register_node_type);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lee schermerhorn | lee schermerhorn | 474 | 15.75% | 6 | 6.59% |
| gary hade | gary hade | 465 | 15.45% | 1 | 1.10% |
| andrew morton | andrew morton | 347 | 11.53% | 8 | 8.79% |
| andi kleen | andi kleen | 227 | 7.54% | 6 | 6.59% |
| christoph lameter | christoph lameter | 162 | 5.38% | 13 | 14.29% |
| alex chiang | alex chiang | 144 | 4.79% | 4 | 4.40% |
| kamezawa hiroyuki | kamezawa hiroyuki | 136 | 4.52% | 1 | 1.10% |
| kay sievers | kay sievers | 104 | 3.46% | 3 | 3.30% |
| kosaki motohiro | kosaki motohiro | 96 | 3.19% | 4 | 4.40% |
| yasunori goto | yasunori goto | 90 | 2.99% | 1 | 1.10% |
| mike travis | mike travis | 75 | 2.49% | 2 | 2.20% |
| rik van riel | rik van riel | 73 | 2.43% | 1 | 1.10% |
| lai jiangshan | lai jiangshan | 69 | 2.29% | 3 | 3.30% |
| yasuaki ishimatsu | yasuaki ishimatsu | 57 | 1.89% | 2 | 2.20% |
| david rientjes | david rientjes | 51 | 1.69% | 3 | 3.30% |
| michael rubin | michael rubin | 49 | 1.63% | 1 | 1.10% |
| yinghai lu | yinghai lu | 49 | 1.63% | 2 | 2.20% |
| takashi iwai | takashi iwai | 48 | 1.60% | 1 | 1.10% |
| wen congyang | wen congyang | 48 | 1.60% | 1 | 1.10% |
| claudio scordino | claudio scordino | 34 | 1.13% | 1 | 1.10% |
| mel gorman | mel gorman | 26 | 0.86% | 2 | 2.20% |
| martin hicks | martin hicks | 21 | 0.70% | 1 | 1.10% |
| rusty russell | rusty russell | 18 | 0.60% | 3 | 3.30% |
| keiichiroe tokunaga | keiichiroe tokunaga | 18 | 0.60% | 1 | 1.10% |
| robin holt | robin holt | 15 | 0.50% | 1 | 1.10% |
| nathan fontenot | nathan fontenot | 14 | 0.47% | 1 | 1.10% |
| nick piggin | nick piggin | 13 | 0.43% | 1 | 1.10% |
| miklos szeredi | miklos szeredi | 12 | 0.40% | 1 | 1.10% |
| akinobu mita | akinobu mita | 11 | 0.37% | 1 | 1.10% |
| tejun heo | tejun heo | 11 | 0.37% | 3 | 3.30% |
| xishi qiu | xishi qiu | 9 | 0.30% | 1 | 1.10% |
| sudeep holla | sudeep holla | 7 | 0.23% | 1 | 1.10% |
| matthew dobson | matthew dobson | 7 | 0.23% | 1 | 1.10% |
| greg kroah-hartman | greg kroah-hartman | 7 | 0.23% | 2 | 2.20% |
| john blackwood | john blackwood | 6 | 0.20% | 1 | 1.10% |
| ryota ozaki | ryota ozaki | 5 | 0.17% | 1 | 1.10% |
| patrick mochel | patrick mochel | 4 | 0.13% | 2 | 2.20% |
| rafael aquini | rafael aquini | 3 | 0.10% | 1 | 1.10% |
| kenneth w. chen | kenneth w. chen | 3 | 0.10% | 1 | 1.10% |
| robert p. j. day | robert p. j. day | 1 | 0.03% | 1 | 1.10% |
| Total | 3009 | 100.00% | 91 | 100.00% |
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