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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
commitb4b7ff4b08e691656c9d77c758fc355833128ac0 (patch)
tree82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /mm/memory_hotplug.c
parent35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff)
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'mm/memory_hotplug.c')
-rw-r--r--mm/memory_hotplug.c64
1 files changed, 42 insertions, 22 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index aa992e2df..a042a9d53 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -339,8 +339,8 @@ static int __ref ensure_zone_is_initialized(struct zone *zone,
unsigned long start_pfn, unsigned long num_pages)
{
if (!zone_is_initialized(zone))
- return init_currently_empty_zone(zone, start_pfn, num_pages,
- MEMMAP_HOTPLUG);
+ return init_currently_empty_zone(zone, start_pfn, num_pages);
+
return 0;
}
@@ -1232,23 +1232,21 @@ int zone_for_memory(int nid, u64 start, u64 size, int zone_default,
}
/* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */
-int __ref add_memory(int nid, u64 start, u64 size)
+int __ref add_memory_resource(int nid, struct resource *res)
{
+ u64 start, size;
pg_data_t *pgdat = NULL;
bool new_pgdat;
bool new_node;
- struct resource *res;
int ret;
+ start = res->start;
+ size = resource_size(res);
+
ret = check_hotplug_memory_range(start, size);
if (ret)
return ret;
- res = register_memory_resource(start, size);
- ret = -EEXIST;
- if (!res)
- return ret;
-
{ /* Stupid hack to suppress address-never-null warning */
void *p = NODE_DATA(nid);
new_pgdat = !p;
@@ -1300,13 +1298,28 @@ error:
/* rollback pgdat allocation and others */
if (new_pgdat)
rollback_node_hotadd(nid, pgdat);
- release_memory_resource(res);
memblock_remove(start, size);
out:
mem_hotplug_done();
return ret;
}
+EXPORT_SYMBOL_GPL(add_memory_resource);
+
+int __ref add_memory(int nid, u64 start, u64 size)
+{
+ struct resource *res;
+ int ret;
+
+ res = register_memory_resource(start, size);
+ if (!res)
+ return -EEXIST;
+
+ ret = add_memory_resource(nid, res);
+ if (ret < 0)
+ release_memory_resource(res);
+ return ret;
+}
EXPORT_SYMBOL_GPL(add_memory);
#ifdef CONFIG_MEMORY_HOTREMOVE
@@ -1362,23 +1375,30 @@ int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
*/
int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn)
{
- unsigned long pfn;
+ unsigned long pfn, sec_end_pfn;
struct zone *zone = NULL;
struct page *page;
int i;
- for (pfn = start_pfn;
+ for (pfn = start_pfn, sec_end_pfn = SECTION_ALIGN_UP(start_pfn);
pfn < end_pfn;
- pfn += MAX_ORDER_NR_PAGES) {
- i = 0;
- /* This is just a CONFIG_HOLES_IN_ZONE check.*/
- while ((i < MAX_ORDER_NR_PAGES) && !pfn_valid_within(pfn + i))
- i++;
- if (i == MAX_ORDER_NR_PAGES)
+ pfn = sec_end_pfn + 1, sec_end_pfn += PAGES_PER_SECTION) {
+ /* Make sure the memory section is present first */
+ if (!present_section_nr(pfn_to_section_nr(pfn)))
continue;
- page = pfn_to_page(pfn + i);
- if (zone && page_zone(page) != zone)
- return 0;
- zone = page_zone(page);
+ for (; pfn < sec_end_pfn && pfn < end_pfn;
+ pfn += MAX_ORDER_NR_PAGES) {
+ i = 0;
+ /* This is just a CONFIG_HOLES_IN_ZONE check.*/
+ while ((i < MAX_ORDER_NR_PAGES) &&
+ !pfn_valid_within(pfn + i))
+ i++;
+ if (i == MAX_ORDER_NR_PAGES)
+ continue;
+ page = pfn_to_page(pfn + i);
+ if (zone && page_zone(page) != zone)
+ return 0;
+ zone = page_zone(page);
+ }
}
return 1;
}