mmzone.h documents node_size_lock (which pgdat_resize_lock() locks) as guarding against changes to node_present_pages, so actually lock it when we update node_present_pages to keep that promise. Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx> --- mm/memory_hotplug.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 0bdca10..b59a695 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1582,7 +1582,11 @@ repeat: /* removal success */ zone->managed_pages -= offlined_pages; zone->present_pages -= offlined_pages; + + pgdat_resize_lock(zone->zone_pgdat, &flags); zone->zone_pgdat->node_present_pages -= offlined_pages; + pgdat_resize_unlock(zone->zone_pgdat, &flags); + totalram_pages -= offlined_pages; init_per_zone_wmark_min(); -- 1.8.2.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>