diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 83 |
1 files changed, 44 insertions, 39 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 656ad1c65422..833f854eabe5 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -159,17 +159,58 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat) } #endif /* !CONFIG_SPARSEMEM_VMEMMAP */ +static void grow_zone_span(struct zone *zone, unsigned long start_pfn, + unsigned long end_pfn) +{ + unsigned long old_zone_end_pfn; + + zone_span_writelock(zone); + + old_zone_end_pfn = zone->zone_start_pfn + zone->spanned_pages; + if (start_pfn < zone->zone_start_pfn) + zone->zone_start_pfn = start_pfn; + + zone->spanned_pages = max(old_zone_end_pfn, end_pfn) - + zone->zone_start_pfn; + + zone_span_writeunlock(zone); +} + +static void grow_pgdat_span(struct pglist_data *pgdat, unsigned long start_pfn, + unsigned long end_pfn) +{ + unsigned long old_pgdat_end_pfn = + pgdat->node_start_pfn + pgdat->node_spanned_pages; + + if (start_pfn < pgdat->node_start_pfn) + pgdat->node_start_pfn = start_pfn; + + pgdat->node_spanned_pages = max(old_pgdat_end_pfn, end_pfn) - + pgdat->node_start_pfn; +} + static int __add_zone(struct zone *zone, unsigned long phys_start_pfn) { struct pglist_data *pgdat = zone->zone_pgdat; int nr_pages = PAGES_PER_SECTION; int nid = pgdat->node_id; int zone_type; + unsigned long flags; zone_type = zone - pgdat->node_zones; - if (!zone->wait_table) - return init_currently_empty_zone(zone, phys_start_pfn, - nr_pages, MEMMAP_HOTPLUG); + if (!zone->wait_table) { + int ret; + + ret = init_currently_empty_zone(zone, phys_start_pfn, + nr_pages, MEMMAP_HOTPLUG); + if (ret) + return ret; + } + pgdat_resize_lock(zone->zone_pgdat, &flags); + grow_zone_span(zone, phys_start_pfn, phys_start_pfn + nr_pages); + grow_pgdat_span(zone->zone_pgdat, phys_start_pfn, + phys_start_pfn + nr_pages); + pgdat_resize_unlock(zone->zone_pgdat, &flags); memmap_init_zone(nr_pages, nid, zone_type, phys_start_pfn, MEMMAP_HOTPLUG); return 0; @@ -295,36 +336,6 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn, } EXPORT_SYMBOL_GPL(__remove_pages); -static void grow_zone_span(struct zone *zone, - unsigned long start_pfn, unsigned long end_pfn) -{ - unsigned long old_zone_end_pfn; - - zone_span_writelock(zone); - - old_zone_end_pfn = zone->zone_start_pfn + zone->spanned_pages; - if (start_pfn < zone->zone_start_pfn) - zone->zone_start_pfn = start_pfn; - - zone->spanned_pages = max(old_zone_end_pfn, end_pfn) - - zone->zone_start_pfn; - - zone_span_writeunlock(zone); -} - -static void grow_pgdat_span(struct pglist_data *pgdat, - unsigned long start_pfn, unsigned long end_pfn) -{ - unsigned long old_pgdat_end_pfn = - pgdat->node_start_pfn + pgdat->node_spanned_pages; - - if (start_pfn < pgdat->node_start_pfn) - pgdat->node_start_pfn = start_pfn; - - pgdat->node_spanned_pages = max(old_pgdat_end_pfn, end_pfn) - - pgdat->node_start_pfn; -} - void online_page(struct page *page) { totalram_pages++; @@ -363,7 +374,6 @@ static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages, int online_pages(unsigned long pfn, unsigned long nr_pages) { - unsigned long flags; unsigned long onlined_pages = 0; struct zone *zone; int need_zonelists_rebuild = 0; @@ -391,11 +401,6 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) * memory_block->state_mutex. */ zone = page_zone(pfn_to_page(pfn)); - pgdat_resize_lock(zone->zone_pgdat, &flags); - grow_zone_span(zone, pfn, pfn + nr_pages); - grow_pgdat_span(zone->zone_pgdat, pfn, pfn + nr_pages); - pgdat_resize_unlock(zone->zone_pgdat, &flags); - /* * If this zone is not populated, then it is not in zonelist. * This means the page allocator ignores this zone. |