• Yasunori Goto's avatar
    memory hotplug: rearrange memory hotplug notifier · 7b78d335
    Yasunori Goto authored
    Current memory notifier has some defects yet.  (Fortunately, nothing uses
    it.) This patch is to fix and rearrange for them.
      - Add information of start_pfn, nr_pages, and node id if node status is
        changes from/to memoryless node for callback functions.
        Callbacks can't do anything without those information.
      - Add notification going-online status.
        It is necessary for creating per node structure before the node's
        pages are available.
      - Move GOING_OFFLINE status notification after page isolation.
        It is good place for return memory like cache for callback,
        because returned page is not used again.
      - Make CANCEL events for rollingback when error occurs.
      - Delete MEM_MAPPING_INVALID notification. It will be not used.
      - Fix compile error of (un)register_memory_notifier().
    Signed-off-by: default avatarYasunori Goto <y-goto@jp.fujitsu.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
memory.h 2.57 KB