diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 030ce8a5bb0e..a4cfcdc00455 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -28,6 +28,7 @@ #include <linux/pfn.h> #include <linux/suspend.h> #include <linux/mm_inline.h> +#include <linux/firmware-map.h> #include <asm/tlbflush.h> @@ -414,12 +415,14 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) * This means the page allocator ignores this zone. * So, zonelist must be updated after online. */ + mutex_lock(&zonelists_mutex); if (!populated_zone(zone)) need_zonelists_rebuild = 1; ret = walk_system_ram_range(pfn, nr_pages, &onlined_pages, online_pages_range); if (ret) { + mutex_unlock(&zonelists_mutex); printk(KERN_DEBUG "online_pages %lx at %lx failed\n", nr_pages, pfn); memory_notify(MEM_CANCEL_ONLINE, &arg); @@ -428,8 +431,12 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) zone->present_pages += onlined_pages; zone->zone_pgdat->node_present_pages += onlined_pages; + if (need_zonelists_rebuild) + build_all_zonelists(zone); + else + zone_pcp_update(zone); - zone_pcp_update(zone); + mutex_unlock(&zonelists_mutex); setup_per_zone_wmarks(); calculate_zone_inactive_ratio(zone); if (onlined_pages) { @@ -437,10 +444,7 @@ int online_pages(unsigned long pfn, unsigned long nr_pages) node_set_state(zone_to_nid(zone), N_HIGH_MEMORY); } - if (need_zonelists_rebuild) - build_all_zonelists(); - else - vm_total_pages = nr_free_pagecache_pages(); + vm_total_pages = nr_free_pagecache_pages(); writeback_set_ratelimit(); @@ -481,6 +485,29 @@ static void rollback_node_hotadd(int nid, pg_data_t *pgdat) } +/* + * called by cpu_up() to online a node without onlined memory. + */ +int mem_online_node(int nid) +{ + pg_data_t *pgdat; + int ret; + + lock_system_sleep(); + pgdat = hotadd_new_pgdat(nid, 0); + if (pgdat) { + ret = -ENOMEM; + goto out; + } + node_set_online(nid); + ret = register_one_node(nid); + BUG_ON(ret); + +out: + unlock_system_sleep(); + return ret; +} + /* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */ int __ref add_memory(int nid, u64 start, u64 size) { @@ -523,6 +550,9 @@ int __ref add_memory(int nid, u64 start, u64 size) BUG_ON(ret); } + /* create new memmap entry */ + firmware_map_add_hotplug(start, start + size, "System RAM"); + goto out; error: @@ -684,9 +714,9 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn) if (page_count(page)) not_managed++; #ifdef CONFIG_DEBUG_VM - printk(KERN_INFO "removing from LRU failed" - " %lx/%d/%lx\n", - pfn, page_count(page), page->flags); + printk(KERN_ALERT "removing pfn %lx from LRU failed\n", + pfn); + dump_page(page); #endif } } |