diff options
| -rw-r--r-- | drivers/base/memory.c | 9 | ||||
| -rw-r--r-- | include/linux/memory_hotplug.h | 1 | ||||
| -rw-r--r-- | mm/memory_hotplug.c | 13 |
3 files changed, 15 insertions, 8 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 7dda4f7..44e7de6 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -248,26 +248,23 @@ static bool pages_correctly_reserved(unsigned long start_pfn, static int memory_block_action(unsigned long phys_index, unsigned long action) { - unsigned long start_pfn, start_paddr; + unsigned long start_pfn; unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block; struct page *first_page; int ret; first_page = pfn_to_page(phys_index << PFN_SECTION_SHIFT); + start_pfn = page_to_pfn(first_page); switch (action) { case MEM_ONLINE: - start_pfn = page_to_pfn(first_page); - if (!pages_correctly_reserved(start_pfn, nr_pages)) return -EBUSY; ret = online_pages(start_pfn, nr_pages); break; case MEM_OFFLINE: - start_paddr = page_to_pfn(first_page) << PAGE_SHIFT; - ret = remove_memory(start_paddr, - nr_pages << PAGE_SHIFT); + ret = offline_pages(start_pfn, nr_pages); break; default: WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: " diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 910550f..e64fe80 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -233,6 +233,7 @@ static inline int is_mem_section_removable(unsigned long pfn, extern int mem_online_node(int nid); extern int add_memory(int nid, u64 start, u64 size); extern int arch_add_memory(int nid, u64 start, u64 size); +extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); extern int remove_memory(u64 start, u64 size); extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn, int nr_pages); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index ce690a9..dfc0a61 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -874,7 +874,7 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn) return offlined; } -static int __ref offline_pages(unsigned long start_pfn, +static int __ref __offline_pages(unsigned long start_pfn, unsigned long end_pfn, unsigned long timeout) { unsigned long pfn, nr_pages, expire; @@ -1007,15 +1007,24 @@ out: return ret; } +int offline_pages(unsigned long start_pfn, unsigned long nr_pages) +{ + return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ); +} + int remove_memory(u64 start, u64 size) { unsigned long start_pfn, end_pfn; start_pfn = PFN_DOWN(start); end_pfn = start_pfn + PFN_DOWN(size); - return offline_pages(start_pfn, end_pfn, 120 * HZ); + return __offline_pages(start_pfn, end_pfn, 120 * HZ); } #else +int offline_pages(unsigned long start_pfn, unsigned long nr_pages) +{ + return -EINVAL; +} int remove_memory(u64 start, u64 size) { return -EINVAL; |