diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 252e1dbbed86..9fab10795bea 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -31,6 +31,7 @@ #include <linux/stop_machine.h> #include <linux/hugetlb.h> #include <linux/memblock.h> +#include <linux/bootmem.h> #include <asm/tlbflush.h> @@ -1066,6 +1067,16 @@ out: } #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ +static void reset_node_present_pages(pg_data_t *pgdat) +{ + struct zone *z; + + for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) + z->present_pages = 0; + + pgdat->node_present_pages = 0; +} + /* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */ static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start) { @@ -1096,6 +1107,21 @@ static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start) build_all_zonelists(pgdat, NULL); mutex_unlock(&zonelists_mutex); + /* + * zone->managed_pages is set to an approximate value in + * free_area_init_core(), which will cause + * /sys/device/system/node/nodeX/meminfo has wrong data. + * So reset it to 0 before any memory is onlined. + */ + reset_node_managed_pages(pgdat); + + /* + * When memory is hot-added, all the memory is in offline state. So + * clear all zones' present_pages because they will be updated in + * online_pages() and offline_pages(). + */ + reset_node_present_pages(pgdat); + return pgdat; } @@ -1699,7 +1725,7 @@ repeat: if (drain) { lru_add_drain_all(); cond_resched(); - drain_all_pages(); + drain_all_pages(zone); } pfn = scan_movable_pages(start_pfn, end_pfn); @@ -1721,7 +1747,7 @@ repeat: lru_add_drain_all(); yield(); /* drain pcp pages, this is synchronous. */ - drain_all_pages(); + drain_all_pages(zone); /* * dissolve free hugepages in the memory block before doing offlining * actually in order to make hugetlbfs's object counting consistent. |