• Mel Gorman's avatar
    mm: filter based on a nodemask as well as a gfp_mask · 19770b32
    Mel Gorman authored
    The MPOL_BIND policy creates a zonelist that is used for allocations
    controlled by that mempolicy.  As the per-node zonelist is already being
    filtered based on a zone id, this patch adds a version of __alloc_pages() that
    takes a nodemask for further filtering.  This eliminates the need for
    MPOL_BIND to create a custom zonelist.
    A positive benefit of this is that allocations using MPOL_BIND now use the
    local node's distance-ordered zonelist instead of a custom node-id-ordered
    zonelist.  I.e., pages will be allocated from the closest allowed node with
    available memory.
    [Lee.Schermerhorn@hp.com: Mempolicy: update stale documentation and comments]
    [Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask]
    [Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask rework]
    Signed-off-by: default avatarMel Gorman <mel@csn.ul.ie>
    Acked-by: default avatarChristoph Lameter <clameter@sgi.com>
    Signed-off-by: default avatarLee Schermerhorn <lee.schermerhorn@hp.com>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Cc: Mel Gorman <mel@csn.ul.ie>
    Cc: Hugh Dickins <hugh@veritas.com>
    Cc: Nick Piggin <nickpiggin@yahoo.com.au>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>