[PATCH V2 00/10] Reduce the pte framgment size.

[Aneesh Kumar K.V]

Hi,

This patch series update 4k subpage tracking in pte page, thereby reducing
the ptefragment size. This results in us allocating less number of
pgtable_t for an application. One of the side effect is that we now make
and hcall to find out whether a 4k subpage is present in the hash page table or not.
We try to optmize that in patch "powerpc/mm: Optmize the hashed subpage iteration"

Changes from V1:
* rebased on top of 4.3 + change pte format series
* Use H_READ_4 so that we read 4 hpte slot information in single hcall.

Aneesh Kumar K.V (10):
  powerpc/mm: Don't hardcode page table size
  powerpc/mm: Don't hardcode the hash pte slot shift
  powerpc/nohash: Update 64K nohash config to have 32 pte fragement
  powerpc/nohash: we don't use real_pte_t for nohash
  powerpc/mm: Use H_READ with H_READ_4
  powerpc/mm: Don't track 4k subpage information with 64k linux page
    size
  powerpc/mm: update PTE frag size
  powerpc/mm: Update pte_iterate_hashed_subpages args
  powerpc/mm: Drop real_pte_t usage
  powerpc/mm: Optmize the hashed subpage iteration

 arch/powerpc/include/asm/book3s/64/hash-64k.h    |  82 ++++++++-----------
 arch/powerpc/include/asm/book3s/64/pgtable.h     |  35 ++++----
 arch/powerpc/include/asm/machdep.h               |   1 +
 arch/powerpc/include/asm/nohash/64/pgtable-64k.h |  21 ++++-
 arch/powerpc/include/asm/nohash/64/pgtable.h     |  33 --------
 arch/powerpc/include/asm/page.h                  |  15 ----
 arch/powerpc/include/asm/pgalloc-64.h            |  10 ---
 arch/powerpc/include/asm/plpar_wrappers.h        |  17 ++++
 arch/powerpc/include/asm/tlbflush.h              |   4 +-
 arch/powerpc/mm/hash64_64k.c                     | 100 ++++++++++++++---------
 arch/powerpc/mm/hash_native_64.c                 |  55 +++++++++++--
 arch/powerpc/mm/hash_utils_64.c                  |  13 +--
 arch/powerpc/mm/init_64.c                        |   7 +-
 arch/powerpc/mm/pgtable_64.c                     |   6 +-
 arch/powerpc/mm/tlb_hash64.c                     |  15 ++--
 arch/powerpc/platforms/pseries/lpar.c            |  90 +++++++++++++-------
 16 files changed, 279 insertions(+), 225 deletions(-)

-- 
2.5.0