On Wed, May 08, 2013 at 10:52:38AM +0100, Steve Capper wrote: > In paging_init the memblock limit is set to restrict any addresses > returned by early_alloc to fit within the initial direct kernel > mapping in swapper_pg_dir. This allows map_mem to allocate puds, > pmds and ptes from the initial direct kernel mapping. > > The limit stays low after paging_init() though, meaning any > bootmem allocations will be from a restricted subset of memory. > Gigabyte huge pages, for instance, are normally allocated from > bootmem as their order (18) is too large for the default buddy > allocator (MAX_ORDER = 11). > > This patch restores the memblock limit when map_mem has finished, > allowing gigabyte huge pages (and other objects) to be allocated > from all of bootmem. > > Signed-off-by: Steve Capper <steve.capper@xxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> -- 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>