diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory_hotplug.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 0b11a8543441..f13783e81eb6 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -127,6 +127,9 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) unsigned long i; unsigned long flags; unsigned long onlined_pages = 0; + struct resource res; + u64 section_end; + unsigned long start_pfn; struct zone *zone; int need_zonelists_rebuild = 0; @@ -149,10 +152,27 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) if (!populated_zone(zone)) need_zonelists_rebuild = 1; - for (i = 0; i < nr_pages; i++) { - struct page *page = pfn_to_page(pfn + i); - online_page(page); - onlined_pages++; + res.start = (u64)pfn << PAGE_SHIFT; + res.end = res.start + ((u64)nr_pages << PAGE_SHIFT) - 1; + res.flags = IORESOURCE_MEM; /* we just need system ram */ + section_end = res.end; + + while (find_next_system_ram(&res) >= 0) { + start_pfn = (unsigned long)(res.start >> PAGE_SHIFT); + nr_pages = (unsigned long) + ((res.end + 1 - res.start) >> PAGE_SHIFT); + + if (PageReserved(pfn_to_page(start_pfn))) { + /* this region's page is not onlined now */ + for (i = 0; i < nr_pages; i++) { + struct page *page = pfn_to_page(start_pfn + i); + online_page(page); + onlined_pages++; + } + } + + res.start = res.end + 1; + res.end = section_end; } zone->present_pages += onlined_pages; zone->zone_pgdat->node_present_pages += onlined_pages; |