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-rw-r--r--drivers/base/memory.c4
-rw-r--r--drivers/base/node.c22
-rw-r--r--include/linux/memory.h2
-rw-r--r--include/linux/node.h4
-rw-r--r--mm/memory_hotplug.c2
5 files changed, 21 insertions, 13 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index deb3f029b451..79fcd2bae96b 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -712,7 +712,7 @@ static int add_memory_block(int base_section_nr)
* need an interface for the VM to add new memory regions,
* but without onlining it.
*/
-int register_new_memory(int nid, struct mem_section *section)
+int hotplug_memory_register(int nid, struct mem_section *section)
{
int ret = 0;
struct memory_block *mem;
@@ -731,7 +731,7 @@ int register_new_memory(int nid, struct mem_section *section)
}
if (mem->section_count == sections_per_block)
- ret = register_mem_sect_under_node(mem, nid);
+ ret = register_mem_sect_under_node(mem, nid, false);
out:
mutex_unlock(&mem_sysfs_mutex);
return ret;
diff --git a/drivers/base/node.c b/drivers/base/node.c
index c5f81fc621ac..92b00a7e6a02 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -399,7 +399,8 @@ static int __ref get_nid_for_pfn(unsigned long pfn)
}
/* 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 register_mem_sect_under_node(struct memory_block *mem_blk, int nid,
+ bool check_nid)
{
int ret;
unsigned long pfn, sect_start_pfn, sect_end_pfn;
@@ -425,11 +426,18 @@ int register_mem_sect_under_node(struct memory_block *mem_blk, int nid)
continue;
}
- page_nid = get_nid_for_pfn(pfn);
- if (page_nid < 0)
- continue;
- if (page_nid != nid)
- 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 (check_nid) {
+ 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));
@@ -504,7 +512,7 @@ int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages)
mem_blk = find_memory_block_hinted(mem_sect, mem_blk);
- ret = register_mem_sect_under_node(mem_blk, nid);
+ ret = register_mem_sect_under_node(mem_blk, nid, true);
if (!err)
err = ret;
diff --git a/include/linux/memory.h b/include/linux/memory.h
index f71e732c77b2..9f8cd856ca1e 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -109,7 +109,7 @@ extern int register_memory_notifier(struct notifier_block *nb);
extern void unregister_memory_notifier(struct notifier_block *nb);
extern int register_memory_isolate_notifier(struct notifier_block *nb);
extern void unregister_memory_isolate_notifier(struct notifier_block *nb);
-extern int register_new_memory(int, struct mem_section *);
+int hotplug_memory_register(int nid, struct mem_section *section);
#ifdef CONFIG_MEMORY_HOTREMOVE
extern int unregister_memory_section(struct mem_section *);
#endif
diff --git a/include/linux/node.h b/include/linux/node.h
index 4ece0fee0ffc..41f171861dcc 100644
--- a/include/linux/node.h
+++ b/include/linux/node.h
@@ -67,7 +67,7 @@ extern void unregister_one_node(int nid);
extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
extern int register_mem_sect_under_node(struct memory_block *mem_blk,
- int nid);
+ int nid, bool check_nid);
extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
unsigned long phys_index);
@@ -97,7 +97,7 @@ static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
return 0;
}
static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
- int nid)
+ int nid, bool check_nid)
{
return 0;
}
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 565048f496f7..477e183a4ac7 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -279,7 +279,7 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
if (!want_memblock)
return 0;
- return register_new_memory(nid, __pfn_to_section(phys_start_pfn));
+ return hotplug_memory_register(nid, __pfn_to_section(phys_start_pfn));
}
/*