• Yasunori Goto's avatar
    memory hotplug: Hot-add with sparsemem-vmemmap · 98f3cfc1
    Yasunori Goto authored
    This patch is to avoid panic when memory hot-add is executed with
    sparsemem-vmemmap.  Current vmemmap-sparsemem code doesn't support memory
    hot-add.  Vmemmap must be populated when hot-add.  This is for
    2.6.23-rc2-mm2.
    
    Todo: # Even if this patch is applied, the message "[xxxx-xxxx] potential
            offnode page_structs" is displayed. To allocate memmap on its node,
            memmap (and pgdat) must be initialized itself like chicken and
            egg relationship.
    
          # vmemmap_unpopulate will be necessary for followings.
             - For cancel hot-add due to error.
             - For unplug.
    Signed-off-by: default avatarYasunori Goto <y-goto@jp.fujitsu.com>
    Cc: Andy Whitcroft <apw@shadowen.org>
    Cc: Christoph Lameter <clameter@sgi.com>
    Cc: Mel Gorman <mel@csn.ul.ie>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    98f3cfc1
sparse-vmemmap.c 3.93 KB