Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 2 | * Basic Node interface support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | */ |
| 4 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/module.h> |
| 6 | #include <linux/init.h> |
| 7 | #include <linux/mm.h> |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 8 | #include <linux/memory.h> |
KOSAKI Motohiro | fa25c50 | 2011-05-24 17:11:28 -0700 | [diff] [blame] | 9 | #include <linux/vmstat.h> |
Andrew Morton | 6e259e7 | 2013-04-29 15:08:07 -0700 | [diff] [blame] | 10 | #include <linux/notifier.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/node.h> |
| 12 | #include <linux/hugetlb.h> |
Mel Gorman | ed4a6d7 | 2010-05-24 14:32:29 -0700 | [diff] [blame] | 13 | #include <linux/compaction.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/cpumask.h> |
| 15 | #include <linux/topology.h> |
| 16 | #include <linux/nodemask.h> |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 17 | #include <linux/cpu.h> |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 18 | #include <linux/device.h> |
Lee Schermerhorn | af936a1 | 2008-10-18 20:26:53 -0700 | [diff] [blame] | 19 | #include <linux/swap.h> |
Tejun Heo | 18e5b53 | 2010-04-06 19:23:33 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 22 | static struct bus_type node_subsys = { |
Kay Sievers | af5ca3f | 2007-12-20 02:09:39 +0100 | [diff] [blame] | 23 | .name = "node", |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 24 | .dev_name = "node", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | }; |
| 26 | |
| 27 | |
Sudeep Holla | 5aaba36 | 2014-09-30 14:48:22 +0100 | [diff] [blame] | 28 | static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | { |
| 30 | struct node *node_dev = to_node(dev); |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 31 | const struct cpumask *mask = cpumask_of_node(node_dev->dev.id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Mike Travis | 39106dc | 2008-04-08 11:43:03 -0700 | [diff] [blame] | 33 | /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ |
| 34 | BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Sudeep Holla | 5aaba36 | 2014-09-30 14:48:22 +0100 | [diff] [blame] | 36 | return cpumap_print_to_pagebuf(list, buf, mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | } |
| 38 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 39 | static inline ssize_t node_read_cpumask(struct device *dev, |
| 40 | struct device_attribute *attr, char *buf) |
Mike Travis | 39106dc | 2008-04-08 11:43:03 -0700 | [diff] [blame] | 41 | { |
Sudeep Holla | 5aaba36 | 2014-09-30 14:48:22 +0100 | [diff] [blame] | 42 | return node_read_cpumap(dev, false, buf); |
Mike Travis | 39106dc | 2008-04-08 11:43:03 -0700 | [diff] [blame] | 43 | } |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 44 | static inline ssize_t node_read_cpulist(struct device *dev, |
| 45 | struct device_attribute *attr, char *buf) |
Mike Travis | 39106dc | 2008-04-08 11:43:03 -0700 | [diff] [blame] | 46 | { |
Sudeep Holla | 5aaba36 | 2014-09-30 14:48:22 +0100 | [diff] [blame] | 47 | return node_read_cpumap(dev, true, buf); |
Mike Travis | 39106dc | 2008-04-08 11:43:03 -0700 | [diff] [blame] | 48 | } |
| 49 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 50 | static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); |
| 51 | static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | #define K(x) ((x) << (PAGE_SHIFT - 10)) |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 54 | static ssize_t node_read_meminfo(struct device *dev, |
| 55 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
| 57 | int n; |
| 58 | int nid = dev->id; |
| 59 | struct sysinfo i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | si_meminfo_node(&i, nid); |
KOSAKI Motohiro | 7ee9225 | 2010-08-09 17:19:50 -0700 | [diff] [blame] | 62 | n = sprintf(buf, |
Rik van Riel | 4f98a2f | 2008-10-18 20:26:32 -0700 | [diff] [blame] | 63 | "Node %d MemTotal: %8lu kB\n" |
| 64 | "Node %d MemFree: %8lu kB\n" |
| 65 | "Node %d MemUsed: %8lu kB\n" |
| 66 | "Node %d Active: %8lu kB\n" |
| 67 | "Node %d Inactive: %8lu kB\n" |
| 68 | "Node %d Active(anon): %8lu kB\n" |
| 69 | "Node %d Inactive(anon): %8lu kB\n" |
| 70 | "Node %d Active(file): %8lu kB\n" |
| 71 | "Node %d Inactive(file): %8lu kB\n" |
Nick Piggin | 5344b7e | 2008-10-18 20:26:51 -0700 | [diff] [blame] | 72 | "Node %d Unevictable: %8lu kB\n" |
KOSAKI Motohiro | 7ee9225 | 2010-08-09 17:19:50 -0700 | [diff] [blame] | 73 | "Node %d Mlocked: %8lu kB\n", |
| 74 | nid, K(i.totalram), |
| 75 | nid, K(i.freeram), |
| 76 | nid, K(i.totalram - i.freeram), |
| 77 | nid, K(node_page_state(nid, NR_ACTIVE_ANON) + |
| 78 | node_page_state(nid, NR_ACTIVE_FILE)), |
| 79 | nid, K(node_page_state(nid, NR_INACTIVE_ANON) + |
| 80 | node_page_state(nid, NR_INACTIVE_FILE)), |
| 81 | nid, K(node_page_state(nid, NR_ACTIVE_ANON)), |
| 82 | nid, K(node_page_state(nid, NR_INACTIVE_ANON)), |
| 83 | nid, K(node_page_state(nid, NR_ACTIVE_FILE)), |
| 84 | nid, K(node_page_state(nid, NR_INACTIVE_FILE)), |
| 85 | nid, K(node_page_state(nid, NR_UNEVICTABLE)), |
| 86 | nid, K(node_page_state(nid, NR_MLOCK))); |
| 87 | |
Christoph Lameter | 182e8e2 | 2006-09-25 23:31:10 -0700 | [diff] [blame] | 88 | #ifdef CONFIG_HIGHMEM |
KOSAKI Motohiro | 7ee9225 | 2010-08-09 17:19:50 -0700 | [diff] [blame] | 89 | n += sprintf(buf + n, |
Rik van Riel | 4f98a2f | 2008-10-18 20:26:32 -0700 | [diff] [blame] | 90 | "Node %d HighTotal: %8lu kB\n" |
| 91 | "Node %d HighFree: %8lu kB\n" |
| 92 | "Node %d LowTotal: %8lu kB\n" |
KOSAKI Motohiro | 7ee9225 | 2010-08-09 17:19:50 -0700 | [diff] [blame] | 93 | "Node %d LowFree: %8lu kB\n", |
| 94 | nid, K(i.totalhigh), |
| 95 | nid, K(i.freehigh), |
| 96 | nid, K(i.totalram - i.totalhigh), |
| 97 | nid, K(i.freeram - i.freehigh)); |
Christoph Lameter | 182e8e2 | 2006-09-25 23:31:10 -0700 | [diff] [blame] | 98 | #endif |
KOSAKI Motohiro | 7ee9225 | 2010-08-09 17:19:50 -0700 | [diff] [blame] | 99 | n += sprintf(buf + n, |
Rik van Riel | 4f98a2f | 2008-10-18 20:26:32 -0700 | [diff] [blame] | 100 | "Node %d Dirty: %8lu kB\n" |
| 101 | "Node %d Writeback: %8lu kB\n" |
| 102 | "Node %d FilePages: %8lu kB\n" |
| 103 | "Node %d Mapped: %8lu kB\n" |
| 104 | "Node %d AnonPages: %8lu kB\n" |
KOSAKI Motohiro | 4b02108 | 2009-09-21 17:01:33 -0700 | [diff] [blame] | 105 | "Node %d Shmem: %8lu kB\n" |
KOSAKI Motohiro | c6a7f57 | 2009-09-21 17:01:32 -0700 | [diff] [blame] | 106 | "Node %d KernelStack: %8lu kB\n" |
Rik van Riel | 4f98a2f | 2008-10-18 20:26:32 -0700 | [diff] [blame] | 107 | "Node %d PageTables: %8lu kB\n" |
| 108 | "Node %d NFS_Unstable: %8lu kB\n" |
| 109 | "Node %d Bounce: %8lu kB\n" |
| 110 | "Node %d WritebackTmp: %8lu kB\n" |
| 111 | "Node %d Slab: %8lu kB\n" |
| 112 | "Node %d SReclaimable: %8lu kB\n" |
David Rientjes | 05b258e | 2011-01-13 15:47:14 -0800 | [diff] [blame] | 113 | "Node %d SUnreclaim: %8lu kB\n" |
| 114 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 115 | "Node %d AnonHugePages: %8lu kB\n" |
| 116 | #endif |
| 117 | , |
Christoph Lameter | b1e7a8f | 2006-06-30 01:55:39 -0700 | [diff] [blame] | 118 | nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
Christoph Lameter | ce866b3 | 2006-06-30 01:55:40 -0700 | [diff] [blame] | 119 | nid, K(node_page_state(nid, NR_WRITEBACK)), |
Christoph Lameter | 347ce43 | 2006-06-30 01:55:35 -0700 | [diff] [blame] | 120 | nid, K(node_page_state(nid, NR_FILE_PAGES)), |
Christoph Lameter | 65ba55f | 2006-06-30 01:55:34 -0700 | [diff] [blame] | 121 | nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
Claudio Scordino | 91a13c2 | 2011-11-17 11:08:32 +0100 | [diff] [blame] | 122 | nid, K(node_page_state(nid, NR_ANON_PAGES)), |
Rafael Aquini | cc7452b | 2014-08-06 16:06:38 -0700 | [diff] [blame] | 123 | nid, K(i.sharedram), |
KOSAKI Motohiro | c6a7f57 | 2009-09-21 17:01:32 -0700 | [diff] [blame] | 124 | nid, node_page_state(nid, NR_KERNEL_STACK) * |
| 125 | THREAD_SIZE / 1024, |
Christoph Lameter | df849a1 | 2006-06-30 01:55:38 -0700 | [diff] [blame] | 126 | nid, K(node_page_state(nid, NR_PAGETABLE)), |
Christoph Lameter | fd39fc8 | 2006-06-30 01:55:40 -0700 | [diff] [blame] | 127 | nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
Christoph Lameter | d2c5e30 | 2006-06-30 01:55:41 -0700 | [diff] [blame] | 128 | nid, K(node_page_state(nid, NR_BOUNCE)), |
Miklos Szeredi | fc3ba69 | 2008-04-30 00:54:38 -0700 | [diff] [blame] | 129 | nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)), |
Christoph Lameter | 972d1a7 | 2006-09-25 23:31:51 -0700 | [diff] [blame] | 130 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) + |
| 131 | node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), |
| 132 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), |
David Rientjes | 05b258e | 2011-01-13 15:47:14 -0800 | [diff] [blame] | 133 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
Claudio Scordino | 91a13c2 | 2011-11-17 11:08:32 +0100 | [diff] [blame] | 134 | nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)) |
David Rientjes | 05b258e | 2011-01-13 15:47:14 -0800 | [diff] [blame] | 135 | , nid, |
| 136 | K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) * |
Claudio Scordino | 91a13c2 | 2011-11-17 11:08:32 +0100 | [diff] [blame] | 137 | HPAGE_PMD_NR)); |
| 138 | #else |
| 139 | nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); |
David Rientjes | 05b258e | 2011-01-13 15:47:14 -0800 | [diff] [blame] | 140 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | n += hugetlb_report_node_meminfo(nid, buf + n); |
| 142 | return n; |
| 143 | } |
| 144 | |
| 145 | #undef K |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 146 | static DEVICE_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 148 | static ssize_t node_read_numastat(struct device *dev, |
| 149 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | return sprintf(buf, |
| 152 | "numa_hit %lu\n" |
| 153 | "numa_miss %lu\n" |
| 154 | "numa_foreign %lu\n" |
| 155 | "interleave_hit %lu\n" |
| 156 | "local_node %lu\n" |
| 157 | "other_node %lu\n", |
Christoph Lameter | ca889e6 | 2006-06-30 01:55:44 -0700 | [diff] [blame] | 158 | node_page_state(dev->id, NUMA_HIT), |
| 159 | node_page_state(dev->id, NUMA_MISS), |
| 160 | node_page_state(dev->id, NUMA_FOREIGN), |
| 161 | node_page_state(dev->id, NUMA_INTERLEAVE_HIT), |
| 162 | node_page_state(dev->id, NUMA_LOCAL), |
| 163 | node_page_state(dev->id, NUMA_OTHER)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 165 | static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 167 | static ssize_t node_read_vmstat(struct device *dev, |
| 168 | struct device_attribute *attr, char *buf) |
Michael Rubin | 2ac3903 | 2010-10-26 14:21:35 -0700 | [diff] [blame] | 169 | { |
| 170 | int nid = dev->id; |
KOSAKI Motohiro | fa25c50 | 2011-05-24 17:11:28 -0700 | [diff] [blame] | 171 | int i; |
| 172 | int n = 0; |
| 173 | |
| 174 | for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) |
| 175 | n += sprintf(buf+n, "%s %lu\n", vmstat_text[i], |
| 176 | node_page_state(nid, i)); |
| 177 | |
| 178 | return n; |
Michael Rubin | 2ac3903 | 2010-10-26 14:21:35 -0700 | [diff] [blame] | 179 | } |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 180 | static DEVICE_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL); |
Michael Rubin | 2ac3903 | 2010-10-26 14:21:35 -0700 | [diff] [blame] | 181 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 182 | static ssize_t node_read_distance(struct device *dev, |
| 183 | struct device_attribute *attr, char * buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
| 185 | int nid = dev->id; |
| 186 | int len = 0; |
| 187 | int i; |
| 188 | |
David Rientjes | 12ee3c0 | 2010-03-10 14:50:21 -0800 | [diff] [blame] | 189 | /* |
| 190 | * buf is currently PAGE_SIZE in length and each node needs 4 chars |
| 191 | * at the most (distance + space or newline). |
| 192 | */ |
| 193 | BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
| 195 | for_each_online_node(i) |
| 196 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); |
| 197 | |
| 198 | len += sprintf(buf + len, "\n"); |
| 199 | return len; |
| 200 | } |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 201 | static DEVICE_ATTR(distance, S_IRUGO, node_read_distance, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Takashi Iwai | 3c9b8aa | 2015-01-29 12:29:22 +0100 | [diff] [blame] | 203 | static struct attribute *node_dev_attrs[] = { |
| 204 | &dev_attr_cpumap.attr, |
| 205 | &dev_attr_cpulist.attr, |
| 206 | &dev_attr_meminfo.attr, |
| 207 | &dev_attr_numastat.attr, |
| 208 | &dev_attr_distance.attr, |
| 209 | &dev_attr_vmstat.attr, |
| 210 | NULL |
| 211 | }; |
Greg Kroah-Hartman | 7ca7ec4 | 2015-03-25 13:47:17 +0100 | [diff] [blame^] | 212 | ATTRIBUTE_GROUPS(node_dev); |
Takashi Iwai | 3c9b8aa | 2015-01-29 12:29:22 +0100 | [diff] [blame] | 213 | |
Lee Schermerhorn | 9a305230 | 2009-12-14 17:58:25 -0800 | [diff] [blame] | 214 | #ifdef CONFIG_HUGETLBFS |
| 215 | /* |
| 216 | * hugetlbfs per node attributes registration interface: |
| 217 | * When/if hugetlb[fs] subsystem initializes [sometime after this module], |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 218 | * it will register its per node attributes for all online nodes with |
| 219 | * memory. It will also call register_hugetlbfs_with_node(), below, to |
Lee Schermerhorn | 9a305230 | 2009-12-14 17:58:25 -0800 | [diff] [blame] | 220 | * register its attribute registration functions with this node driver. |
| 221 | * Once these hooks have been initialized, the node driver will call into |
| 222 | * the hugetlb module to [un]register attributes for hot-plugged nodes. |
| 223 | */ |
| 224 | static node_registration_func_t __hugetlb_register_node; |
| 225 | static node_registration_func_t __hugetlb_unregister_node; |
| 226 | |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 227 | static inline bool hugetlb_register_node(struct node *node) |
Lee Schermerhorn | 9a305230 | 2009-12-14 17:58:25 -0800 | [diff] [blame] | 228 | { |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 229 | if (__hugetlb_register_node && |
Lai Jiangshan | 8cebfcd | 2012-12-12 13:51:36 -0800 | [diff] [blame] | 230 | node_state(node->dev.id, N_MEMORY)) { |
Lee Schermerhorn | 9a305230 | 2009-12-14 17:58:25 -0800 | [diff] [blame] | 231 | __hugetlb_register_node(node); |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 232 | return true; |
| 233 | } |
| 234 | return false; |
Lee Schermerhorn | 9a305230 | 2009-12-14 17:58:25 -0800 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | static inline void hugetlb_unregister_node(struct node *node) |
| 238 | { |
| 239 | if (__hugetlb_unregister_node) |
| 240 | __hugetlb_unregister_node(node); |
| 241 | } |
| 242 | |
| 243 | void register_hugetlbfs_with_node(node_registration_func_t doregister, |
| 244 | node_registration_func_t unregister) |
| 245 | { |
| 246 | __hugetlb_register_node = doregister; |
| 247 | __hugetlb_unregister_node = unregister; |
| 248 | } |
| 249 | #else |
| 250 | static inline void hugetlb_register_node(struct node *node) {} |
| 251 | |
| 252 | static inline void hugetlb_unregister_node(struct node *node) {} |
| 253 | #endif |
| 254 | |
Yasuaki Ishimatsu | 8c7b5b4 | 2012-12-11 16:00:57 -0800 | [diff] [blame] | 255 | static void node_device_release(struct device *dev) |
| 256 | { |
| 257 | struct node *node = to_node(dev); |
| 258 | |
| 259 | #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS) |
| 260 | /* |
| 261 | * We schedule the work only when a memory section is |
| 262 | * onlined/offlined on this node. When we come here, |
| 263 | * all the memory on this node has been offlined, |
| 264 | * so we won't enqueue new work to this work. |
| 265 | * |
| 266 | * The work is using node->node_work, so we should |
| 267 | * flush work before freeing the memory. |
| 268 | */ |
| 269 | flush_work(&node->node_work); |
| 270 | #endif |
| 271 | kfree(node); |
| 272 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | /* |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 275 | * register_node - Setup a sysfs device for a node. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | * @num - Node number to use when creating the device. |
| 277 | * |
| 278 | * Initialize and register the node device. |
| 279 | */ |
Yasuaki Ishimatsu | fa26437 | 2012-12-11 16:02:52 -0800 | [diff] [blame] | 280 | static int register_node(struct node *node, int num, struct node *parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
| 282 | int error; |
| 283 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 284 | node->dev.id = num; |
| 285 | node->dev.bus = &node_subsys; |
Yasuaki Ishimatsu | 8c7b5b4 | 2012-12-11 16:00:57 -0800 | [diff] [blame] | 286 | node->dev.release = node_device_release; |
Greg Kroah-Hartman | 7ca7ec4 | 2015-03-25 13:47:17 +0100 | [diff] [blame^] | 287 | node->dev.groups = node_dev_groups; |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 288 | error = device_register(&node->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | if (!error){ |
Lee Schermerhorn | 9a305230 | 2009-12-14 17:58:25 -0800 | [diff] [blame] | 291 | hugetlb_register_node(node); |
Mel Gorman | ed4a6d7 | 2010-05-24 14:32:29 -0700 | [diff] [blame] | 292 | |
| 293 | compaction_register_node(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | return error; |
| 296 | } |
| 297 | |
Keiichiro Tokunaga | 4b45099 | 2005-05-08 21:28:53 +0900 | [diff] [blame] | 298 | /** |
| 299 | * unregister_node - unregister a node device |
| 300 | * @node: node going away |
| 301 | * |
| 302 | * Unregisters a node device @node. All the devices on the node must be |
| 303 | * unregistered before calling this function. |
| 304 | */ |
| 305 | void unregister_node(struct node *node) |
| 306 | { |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 307 | hugetlb_unregister_node(node); /* no-op, if memoryless node */ |
Lee Schermerhorn | af936a1 | 2008-10-18 20:26:53 -0700 | [diff] [blame] | 308 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 309 | device_unregister(&node->dev); |
Keiichiro Tokunaga | 4b45099 | 2005-05-08 21:28:53 +0900 | [diff] [blame] | 310 | } |
| 311 | |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 312 | struct node *node_devices[MAX_NUMNODES]; |
Yasunori Goto | 0fc4415 | 2006-06-27 02:53:38 -0700 | [diff] [blame] | 313 | |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 314 | /* |
| 315 | * register cpu under node |
| 316 | */ |
| 317 | int register_cpu_under_node(unsigned int cpu, unsigned int nid) |
| 318 | { |
Alex Chiang | 1830794 | 2009-12-14 17:59:08 -0800 | [diff] [blame] | 319 | int ret; |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 320 | struct device *obj; |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 321 | |
Alex Chiang | f8246f3 | 2009-12-14 17:59:06 -0800 | [diff] [blame] | 322 | if (!node_online(nid)) |
| 323 | return 0; |
| 324 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 325 | obj = get_cpu_device(cpu); |
Alex Chiang | f8246f3 | 2009-12-14 17:59:06 -0800 | [diff] [blame] | 326 | if (!obj) |
| 327 | return 0; |
| 328 | |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 329 | ret = sysfs_create_link(&node_devices[nid]->dev.kobj, |
Alex Chiang | f8246f3 | 2009-12-14 17:59:06 -0800 | [diff] [blame] | 330 | &obj->kobj, |
| 331 | kobject_name(&obj->kobj)); |
Alex Chiang | 1830794 | 2009-12-14 17:59:08 -0800 | [diff] [blame] | 332 | if (ret) |
| 333 | return ret; |
| 334 | |
| 335 | return sysfs_create_link(&obj->kobj, |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 336 | &node_devices[nid]->dev.kobj, |
| 337 | kobject_name(&node_devices[nid]->dev.kobj)); |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) |
| 341 | { |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 342 | struct device *obj; |
Alex Chiang | b9d52da | 2009-12-14 17:59:07 -0800 | [diff] [blame] | 343 | |
| 344 | if (!node_online(nid)) |
| 345 | return 0; |
| 346 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 347 | obj = get_cpu_device(cpu); |
Alex Chiang | b9d52da | 2009-12-14 17:59:07 -0800 | [diff] [blame] | 348 | if (!obj) |
| 349 | return 0; |
| 350 | |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 351 | sysfs_remove_link(&node_devices[nid]->dev.kobj, |
Alex Chiang | b9d52da | 2009-12-14 17:59:07 -0800 | [diff] [blame] | 352 | kobject_name(&obj->kobj)); |
Alex Chiang | 1830794 | 2009-12-14 17:59:08 -0800 | [diff] [blame] | 353 | sysfs_remove_link(&obj->kobj, |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 354 | kobject_name(&node_devices[nid]->dev.kobj)); |
Alex Chiang | b9d52da | 2009-12-14 17:59:07 -0800 | [diff] [blame] | 355 | |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 356 | return 0; |
| 357 | } |
| 358 | |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 359 | #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE |
| 360 | #define page_initialized(page) (page->lru.next) |
| 361 | |
| 362 | static int get_nid_for_pfn(unsigned long pfn) |
| 363 | { |
| 364 | struct page *page; |
| 365 | |
| 366 | if (!pfn_valid_within(pfn)) |
| 367 | return -1; |
| 368 | page = pfn_to_page(pfn); |
| 369 | if (!page_initialized(page)) |
| 370 | return -1; |
| 371 | return pfn_to_nid(pfn); |
| 372 | } |
| 373 | |
| 374 | /* register memory section under specified node if it spans that node */ |
| 375 | int register_mem_sect_under_node(struct memory_block *mem_blk, int nid) |
| 376 | { |
Alex Chiang | dee5d0d | 2009-12-14 17:59:05 -0800 | [diff] [blame] | 377 | int ret; |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 378 | unsigned long pfn, sect_start_pfn, sect_end_pfn; |
| 379 | |
| 380 | if (!mem_blk) |
| 381 | return -EFAULT; |
| 382 | if (!node_online(nid)) |
| 383 | return 0; |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 384 | |
| 385 | sect_start_pfn = section_nr_to_pfn(mem_blk->start_section_nr); |
| 386 | sect_end_pfn = section_nr_to_pfn(mem_blk->end_section_nr); |
| 387 | sect_end_pfn += PAGES_PER_SECTION - 1; |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 388 | for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) { |
| 389 | int page_nid; |
| 390 | |
| 391 | page_nid = get_nid_for_pfn(pfn); |
| 392 | if (page_nid < 0) |
| 393 | continue; |
| 394 | if (page_nid != nid) |
| 395 | continue; |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 396 | ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj, |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 397 | &mem_blk->dev.kobj, |
| 398 | kobject_name(&mem_blk->dev.kobj)); |
Alex Chiang | dee5d0d | 2009-12-14 17:59:05 -0800 | [diff] [blame] | 399 | if (ret) |
| 400 | return ret; |
| 401 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 402 | return sysfs_create_link_nowarn(&mem_blk->dev.kobj, |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 403 | &node_devices[nid]->dev.kobj, |
| 404 | kobject_name(&node_devices[nid]->dev.kobj)); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 405 | } |
| 406 | /* mem section does not span the specified node */ |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | /* unregister memory section under all nodes that it spans */ |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 411 | int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
| 412 | unsigned long phys_index) |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 413 | { |
David Rientjes | 9ae49fa | 2009-12-14 17:59:46 -0800 | [diff] [blame] | 414 | NODEMASK_ALLOC(nodemask_t, unlinked_nodes, GFP_KERNEL); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 415 | unsigned long pfn, sect_start_pfn, sect_end_pfn; |
| 416 | |
David Rientjes | 9ae49fa | 2009-12-14 17:59:46 -0800 | [diff] [blame] | 417 | if (!mem_blk) { |
| 418 | NODEMASK_FREE(unlinked_nodes); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 419 | return -EFAULT; |
David Rientjes | 9ae49fa | 2009-12-14 17:59:46 -0800 | [diff] [blame] | 420 | } |
| 421 | if (!unlinked_nodes) |
| 422 | return -ENOMEM; |
| 423 | nodes_clear(*unlinked_nodes); |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 424 | |
| 425 | sect_start_pfn = section_nr_to_pfn(phys_index); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 426 | sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1; |
| 427 | for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) { |
Roel Kluin | 4750498 | 2009-03-10 12:55:45 -0700 | [diff] [blame] | 428 | int nid; |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 429 | |
| 430 | nid = get_nid_for_pfn(pfn); |
| 431 | if (nid < 0) |
| 432 | continue; |
| 433 | if (!node_online(nid)) |
| 434 | continue; |
David Rientjes | 9ae49fa | 2009-12-14 17:59:46 -0800 | [diff] [blame] | 435 | if (node_test_and_set(nid, *unlinked_nodes)) |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 436 | continue; |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 437 | sysfs_remove_link(&node_devices[nid]->dev.kobj, |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 438 | kobject_name(&mem_blk->dev.kobj)); |
| 439 | sysfs_remove_link(&mem_blk->dev.kobj, |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 440 | kobject_name(&node_devices[nid]->dev.kobj)); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 441 | } |
David Rientjes | 9ae49fa | 2009-12-14 17:59:46 -0800 | [diff] [blame] | 442 | NODEMASK_FREE(unlinked_nodes); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int link_mem_sections(int nid) |
| 447 | { |
| 448 | unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn; |
| 449 | unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages; |
| 450 | unsigned long pfn; |
Robin Holt | 63d027a | 2010-09-29 14:00:56 -0500 | [diff] [blame] | 451 | struct memory_block *mem_blk = NULL; |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 452 | int err = 0; |
| 453 | |
| 454 | for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { |
| 455 | unsigned long section_nr = pfn_to_section_nr(pfn); |
| 456 | struct mem_section *mem_sect; |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 457 | int ret; |
| 458 | |
| 459 | if (!present_section_nr(section_nr)) |
| 460 | continue; |
| 461 | mem_sect = __nr_to_section(section_nr); |
Yinghai Lu | 321bf4e | 2012-01-30 13:57:12 -0800 | [diff] [blame] | 462 | |
| 463 | /* same memblock ? */ |
| 464 | if (mem_blk) |
| 465 | if ((section_nr >= mem_blk->start_section_nr) && |
| 466 | (section_nr <= mem_blk->end_section_nr)) |
| 467 | continue; |
| 468 | |
Robin Holt | 63d027a | 2010-09-29 14:00:56 -0500 | [diff] [blame] | 469 | mem_blk = find_memory_block_hinted(mem_sect, mem_blk); |
Yinghai Lu | 321bf4e | 2012-01-30 13:57:12 -0800 | [diff] [blame] | 470 | |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 471 | ret = register_mem_sect_under_node(mem_blk, nid); |
| 472 | if (!err) |
| 473 | err = ret; |
| 474 | |
| 475 | /* discard ref obtained in find_memory_block() */ |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 476 | } |
Robin Holt | 63d027a | 2010-09-29 14:00:56 -0500 | [diff] [blame] | 477 | |
| 478 | if (mem_blk) |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 479 | kobject_put(&mem_blk->dev.kobj); |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 480 | return err; |
| 481 | } |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 482 | |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 483 | #ifdef CONFIG_HUGETLBFS |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 484 | /* |
| 485 | * Handle per node hstate attribute [un]registration on transistions |
| 486 | * to/from memoryless state. |
| 487 | */ |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 488 | static void node_hugetlb_work(struct work_struct *work) |
| 489 | { |
| 490 | struct node *node = container_of(work, struct node, node_work); |
| 491 | |
| 492 | /* |
| 493 | * We only get here when a node transitions to/from memoryless state. |
| 494 | * We can detect which transition occurred by examining whether the |
| 495 | * node has memory now. hugetlb_register_node() already check this |
| 496 | * so we try to register the attributes. If that fails, then the |
| 497 | * node has transitioned to memoryless, try to unregister the |
| 498 | * attributes. |
| 499 | */ |
| 500 | if (!hugetlb_register_node(node)) |
| 501 | hugetlb_unregister_node(node); |
| 502 | } |
| 503 | |
| 504 | static void init_node_hugetlb_work(int nid) |
| 505 | { |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 506 | INIT_WORK(&node_devices[nid]->node_work, node_hugetlb_work); |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 507 | } |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 508 | |
| 509 | static int node_memory_callback(struct notifier_block *self, |
| 510 | unsigned long action, void *arg) |
| 511 | { |
| 512 | struct memory_notify *mnb = arg; |
| 513 | int nid = mnb->status_change_nid; |
| 514 | |
| 515 | switch (action) { |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 516 | case MEM_ONLINE: |
| 517 | case MEM_OFFLINE: |
| 518 | /* |
| 519 | * offload per node hstate [un]registration to a work thread |
| 520 | * when transitioning to/from memoryless state. |
| 521 | */ |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 522 | if (nid != NUMA_NO_NODE) |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 523 | schedule_work(&node_devices[nid]->node_work); |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 524 | break; |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 525 | |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 526 | case MEM_GOING_ONLINE: |
| 527 | case MEM_GOING_OFFLINE: |
| 528 | case MEM_CANCEL_ONLINE: |
| 529 | case MEM_CANCEL_OFFLINE: |
| 530 | default: |
| 531 | break; |
| 532 | } |
| 533 | |
| 534 | return NOTIFY_OK; |
| 535 | } |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 536 | #endif /* CONFIG_HUGETLBFS */ |
| 537 | #else /* !CONFIG_MEMORY_HOTPLUG_SPARSE */ |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 538 | |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 539 | static int link_mem_sections(int nid) { return 0; } |
| 540 | #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ |
| 541 | |
| 542 | #if !defined(CONFIG_MEMORY_HOTPLUG_SPARSE) || \ |
| 543 | !defined(CONFIG_HUGETLBFS) |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 544 | static inline int node_memory_callback(struct notifier_block *self, |
| 545 | unsigned long action, void *arg) |
| 546 | { |
| 547 | return NOTIFY_OK; |
| 548 | } |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 549 | |
| 550 | static void init_node_hugetlb_work(int nid) { } |
| 551 | |
| 552 | #endif |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 553 | |
Yasunori Goto | 0fc4415 | 2006-06-27 02:53:38 -0700 | [diff] [blame] | 554 | int register_one_node(int nid) |
| 555 | { |
| 556 | int error = 0; |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 557 | int cpu; |
Yasunori Goto | 0fc4415 | 2006-06-27 02:53:38 -0700 | [diff] [blame] | 558 | |
| 559 | if (node_online(nid)) { |
| 560 | int p_node = parent_node(nid); |
| 561 | struct node *parent = NULL; |
| 562 | |
| 563 | if (p_node != nid) |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 564 | parent = node_devices[p_node]; |
Yasunori Goto | 0fc4415 | 2006-06-27 02:53:38 -0700 | [diff] [blame] | 565 | |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 566 | node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL); |
| 567 | if (!node_devices[nid]) |
| 568 | return -ENOMEM; |
| 569 | |
| 570 | error = register_node(node_devices[nid], nid, parent); |
KAMEZAWA Hiroyuki | 76b67ed | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 571 | |
| 572 | /* link cpu under this node */ |
| 573 | for_each_present_cpu(cpu) { |
| 574 | if (cpu_to_node(cpu) == nid) |
| 575 | register_cpu_under_node(cpu, nid); |
| 576 | } |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 577 | |
| 578 | /* link memory sections under this node */ |
| 579 | error = link_mem_sections(nid); |
Lee Schermerhorn | 39da08c | 2009-12-14 17:58:36 -0800 | [diff] [blame] | 580 | |
| 581 | /* initialize work queue for memory hot plug */ |
| 582 | init_node_hugetlb_work(nid); |
Yasunori Goto | 0fc4415 | 2006-06-27 02:53:38 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | return error; |
| 586 | |
| 587 | } |
| 588 | |
| 589 | void unregister_one_node(int nid) |
| 590 | { |
Xishi Qiu | 92d585e | 2014-03-06 17:18:21 +0800 | [diff] [blame] | 591 | if (!node_devices[nid]) |
| 592 | return; |
| 593 | |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 594 | unregister_node(node_devices[nid]); |
Wen Congyang | 8732794 | 2012-12-11 16:00:56 -0800 | [diff] [blame] | 595 | node_devices[nid] = NULL; |
Yasunori Goto | 0fc4415 | 2006-06-27 02:53:38 -0700 | [diff] [blame] | 596 | } |
| 597 | |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 598 | /* |
| 599 | * node states attributes |
| 600 | */ |
| 601 | |
| 602 | static ssize_t print_nodes_state(enum node_states state, char *buf) |
| 603 | { |
| 604 | int n; |
| 605 | |
Tejun Heo | f799b1a | 2015-02-13 14:37:56 -0800 | [diff] [blame] | 606 | n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", |
| 607 | nodemask_pr_args(&node_states[state])); |
Ryota Ozaki | f623881 | 2012-05-29 15:06:20 -0700 | [diff] [blame] | 608 | buf[n++] = '\n'; |
| 609 | buf[n] = '\0'; |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 610 | return n; |
| 611 | } |
| 612 | |
Andi Kleen | b15f562 | 2010-01-05 12:47:59 +0100 | [diff] [blame] | 613 | struct node_attr { |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 614 | struct device_attribute attr; |
Andi Kleen | b15f562 | 2010-01-05 12:47:59 +0100 | [diff] [blame] | 615 | enum node_states state; |
| 616 | }; |
| 617 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 618 | static ssize_t show_node_state(struct device *dev, |
| 619 | struct device_attribute *attr, char *buf) |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 620 | { |
Andi Kleen | b15f562 | 2010-01-05 12:47:59 +0100 | [diff] [blame] | 621 | struct node_attr *na = container_of(attr, struct node_attr, attr); |
| 622 | return print_nodes_state(na->state, buf); |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 623 | } |
| 624 | |
Andi Kleen | b15f562 | 2010-01-05 12:47:59 +0100 | [diff] [blame] | 625 | #define _NODE_ATTR(name, state) \ |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 626 | { __ATTR(name, 0444, show_node_state, NULL), state } |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 627 | |
Andi Kleen | b15f562 | 2010-01-05 12:47:59 +0100 | [diff] [blame] | 628 | static struct node_attr node_state_attr[] = { |
Lai Jiangshan | fcf07d2 | 2012-12-11 16:03:13 -0800 | [diff] [blame] | 629 | [N_POSSIBLE] = _NODE_ATTR(possible, N_POSSIBLE), |
| 630 | [N_ONLINE] = _NODE_ATTR(online, N_ONLINE), |
| 631 | [N_NORMAL_MEMORY] = _NODE_ATTR(has_normal_memory, N_NORMAL_MEMORY), |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 632 | #ifdef CONFIG_HIGHMEM |
Lai Jiangshan | fcf07d2 | 2012-12-11 16:03:13 -0800 | [diff] [blame] | 633 | [N_HIGH_MEMORY] = _NODE_ATTR(has_high_memory, N_HIGH_MEMORY), |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 634 | #endif |
Lai Jiangshan | 20b2f52 | 2012-12-12 13:52:00 -0800 | [diff] [blame] | 635 | #ifdef CONFIG_MOVABLE_NODE |
| 636 | [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY), |
| 637 | #endif |
Lai Jiangshan | fcf07d2 | 2012-12-11 16:03:13 -0800 | [diff] [blame] | 638 | [N_CPU] = _NODE_ATTR(has_cpu, N_CPU), |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 639 | }; |
| 640 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 641 | static struct attribute *node_state_attrs[] = { |
Lai Jiangshan | fcf07d2 | 2012-12-11 16:03:13 -0800 | [diff] [blame] | 642 | &node_state_attr[N_POSSIBLE].attr.attr, |
| 643 | &node_state_attr[N_ONLINE].attr.attr, |
| 644 | &node_state_attr[N_NORMAL_MEMORY].attr.attr, |
Andi Kleen | 3701cde | 2010-01-05 12:48:04 +0100 | [diff] [blame] | 645 | #ifdef CONFIG_HIGHMEM |
Lai Jiangshan | fcf07d2 | 2012-12-11 16:03:13 -0800 | [diff] [blame] | 646 | &node_state_attr[N_HIGH_MEMORY].attr.attr, |
Andi Kleen | 3701cde | 2010-01-05 12:48:04 +0100 | [diff] [blame] | 647 | #endif |
Lai Jiangshan | 20b2f52 | 2012-12-12 13:52:00 -0800 | [diff] [blame] | 648 | #ifdef CONFIG_MOVABLE_NODE |
| 649 | &node_state_attr[N_MEMORY].attr.attr, |
| 650 | #endif |
Lai Jiangshan | fcf07d2 | 2012-12-11 16:03:13 -0800 | [diff] [blame] | 651 | &node_state_attr[N_CPU].attr.attr, |
Andi Kleen | 3701cde | 2010-01-05 12:48:04 +0100 | [diff] [blame] | 652 | NULL |
| 653 | }; |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 654 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 655 | static struct attribute_group memory_root_attr_group = { |
| 656 | .attrs = node_state_attrs, |
| 657 | }; |
| 658 | |
| 659 | static const struct attribute_group *cpu_root_attr_groups[] = { |
| 660 | &memory_root_attr_group, |
| 661 | NULL, |
| 662 | }; |
| 663 | |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 664 | #define NODE_CALLBACK_PRI 2 /* lower than SLAB */ |
Keiichiro Tokunaga | 4b45099 | 2005-05-08 21:28:53 +0900 | [diff] [blame] | 665 | static int __init register_node_type(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | { |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 667 | int ret; |
| 668 | |
Andi Kleen | 3701cde | 2010-01-05 12:48:04 +0100 | [diff] [blame] | 669 | BUILD_BUG_ON(ARRAY_SIZE(node_state_attr) != NR_NODE_STATES); |
| 670 | BUILD_BUG_ON(ARRAY_SIZE(node_state_attrs)-1 != NR_NODE_STATES); |
| 671 | |
Kay Sievers | 10fbcf4 | 2011-12-21 14:48:43 -0800 | [diff] [blame] | 672 | ret = subsys_system_register(&node_subsys, cpu_root_attr_groups); |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 673 | if (!ret) { |
Andrew Morton | 6e259e7 | 2013-04-29 15:08:07 -0700 | [diff] [blame] | 674 | static struct notifier_block node_memory_callback_nb = { |
| 675 | .notifier_call = node_memory_callback, |
| 676 | .priority = NODE_CALLBACK_PRI, |
| 677 | }; |
| 678 | register_hotmemory_notifier(&node_memory_callback_nb); |
Lee Schermerhorn | 4faf8d9 | 2009-12-14 17:58:35 -0800 | [diff] [blame] | 679 | } |
Lee Schermerhorn | bde631a | 2007-10-16 01:26:27 -0700 | [diff] [blame] | 680 | |
| 681 | /* |
| 682 | * Note: we're not going to unregister the node class if we fail |
| 683 | * to register the node state class attribute files. |
| 684 | */ |
| 685 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
| 687 | postcore_initcall(register_node_type); |