Michal & all Previously we found the hotplug range is mem_section aligned instead of memory_block. Here is several draft patches to fix that. To make sure I am getting your point correctly, I post it here before further investigation. Willing to see your comments. :-) Wei Yang (4): mm/hotplug: aligne the hotplugable range with memory_block mm/hotplug: walk_memroy_range on memory_block uit mm/hotplug: make __add_pages() iterate on memory_block and split __add_section() base/memory: pass start_section_nr to init_memory_block() drivers/base/memory.c | 34 ++++++++++++---------------------- include/linux/memory.h | 4 +++- mm/memory_hotplug.c | 48 +++++++++++++++++++++++++----------------------- 3 files changed, 40 insertions(+), 46 deletions(-) -- 2.11.0 -- 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>