1. 17 Jul, 2007 1 commit
    • Mel Gorman's avatar
      Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated · 769848c0
      Mel Gorman authored
      It is often known at allocation time whether a page may be migrated or not.
      This patch adds a flag called __GFP_MOVABLE and a new mask called
      GFP_HIGH_MOVABLE.  Allocations using the __GFP_MOVABLE can be either migrated
      using the page migration mechanism or reclaimed by syncing with backing
      storage and discarding.
      An API function very similar to alloc_zeroed_user_highpage() is added for
      __GFP_MOVABLE allocations called alloc_zeroed_user_highpage_movable().  The
      flags used by alloc_zeroed_user_highpage() are not changed because it would
      change the semantics of an existing API.  After this patch is applied there
      are no in-kernel users of alloc_zeroed_user_highpage() so it probably should
      be marked deprecated if this patch is merged.
      Note that this patch includes a minor cleanup to the use of __GFP_ZERO in
      shmem.c to keep all flag modifications to inode->mapping in the
      shmem_dir_alloc() helper function.  This clean-up suggestion is courtesy of
      Hugh Dickens.
      Additional credit goes to Christoph Lameter and Linus Torvalds for shaping the
      concept.  Credit to Hugh Dickens for catching issues with shmem swap vector
      and ramfs allocations.
      [akpm@linux-foundation.org: build fix]
      [hugh@veritas.com: __GFP_ZERO cleanup]
      Signed-off-by: default avatarMel Gorman <mel@csn.ul.ie>
      Cc: Andy Whitcroft <apw@shadowen.org>
      Cc: Christoph Lameter <clameter@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
  2. 16 Jul, 2007 39 commits